diff --git a/bundle.json b/bundle.json
index 8287c1b6..6aafbee6 100644
--- a/bundle.json
+++ b/bundle.json
@@ -76,7 +76,8 @@
                 "image_framework",
                 "movement",
                 "device_standby",
-                "time_service"
+                "time_service",
+                "netmanager_base"
             ]
         },
         "build": {
diff --git a/config.gni b/config.gni
index 0e2d5d78..3da07a09 100644
--- a/config.gni
+++ b/config.gni
@@ -59,6 +59,7 @@ declare_args() {
   time_service_enable = true
   movement_client_enable = true
   location_device_standby_enable = true
+  net_manager_enable = true
 
   if (defined(global_parts_info) && !defined(global_parts_info.global_i18n)) {
     i18n_enable = false
@@ -152,4 +153,9 @@ declare_args() {
       !defined(global_parts_info.time_time_service)) {
     time_service_enable = false
   }
+
+  if (defined(global_parts_info) &&
+      !defined(global_parts_info.communication_netmanager_base)) {
+    net_manager_enable = false
+  }
 }
diff --git a/services/etc/init/locationsa.cfg b/services/etc/init/locationsa.cfg
index 4c797537..be646775 100644
--- a/services/etc/init/locationsa.cfg
+++ b/services/etc/init/locationsa.cfg
@@ -32,7 +32,8 @@
                 "ohos.permission.ACCESS_PROTOCOL_DFX_STATE",
                 "ohos.permission.MANAGE_SETTINGS",
                 "ohos.permission.ACTIVITY_MOTION",
-                "ohos.permission.INTERNET"
+                "ohos.permission.INTERNET",
+                "ohos.permission.GET_NETWORK_INFO"
             ],
             "permission_acls" : ["ohos.permission.GET_SENSITIVE_PERMISSIONS"],
             "critical" : [0, 5, 10],
diff --git a/services/location_gnss/gnss/BUILD.gn b/services/location_gnss/gnss/BUILD.gn
index b947f3c1..940fe20d 100644
--- a/services/location_gnss/gnss/BUILD.gn
+++ b/services/location_gnss/gnss/BUILD.gn
@@ -23,6 +23,12 @@ if (location_feature_with_gnss) {
     "$LOCATION_GNSS_ROOT/source/gnss_ability_skeleton.cpp",
     "$LOCATION_GNSS_ROOT/source/gnss_common_event_subscriber.cpp",
     "$LOCATION_GNSS_ROOT/source/gnss_event_callback.cpp",
+    "$LOCATION_GNSS_ROOT/source/ntp/elapsed_real_time_check.cpp",
+    "$LOCATION_GNSS_ROOT/source/ntp/gps_time_manager.cpp",
+    "$LOCATION_GNSS_ROOT/source/ntp/net_conn_observer.cpp",
+    "$LOCATION_GNSS_ROOT/source/ntp/ntp_time_check.cpp",
+    "$LOCATION_GNSS_ROOT/source/ntp/ntp_time_helper.cpp",
+    "$LOCATION_GNSS_ROOT/source/ntp/time_manager.cpp",
     "$LOCATION_GNSS_ROOT/source/string_utils.cpp",
     "$LOCATION_LOCATOR_ROOT/source/location_config_manager.cpp",
     "$LOCATION_LOCATOR_ROOT/source/subability_common.cpp",
@@ -36,6 +42,7 @@ if (location_feature_with_gnss) {
     include_dirs = [
       "$LOCATION_ROOT_DIR/interfaces/inner_api/include",
       "$LOCATION_GNSS_ROOT/include",
+      "$LOCATION_GNSS_ROOT/include/ntp",
       "$LOCATION_LOCATOR_ROOT/include",
     ]
 
@@ -143,6 +150,11 @@ if (location_feature_with_gnss) {
       defines += [ "TIME_SERVICE_ENABLE" ]
     }
 
+    if (net_manager_enable) {
+      external_deps += [ "netmanager_base:net_conn_manager_if" ]
+      defines += [ "NET_MANAGER_ENABLE" ]
+    }
+
     # Used to control the export of dynamic library symbols.
     version_script = "liblbsservice_gnss_version_script.txt"
 
@@ -156,6 +168,7 @@ if (location_feature_with_gnss) {
     include_dirs = [
       "$LOCATION_ROOT_DIR/interfaces/inner_api/include",
       "$LOCATION_GNSS_ROOT/include",
+      "$LOCATION_GNSS_ROOT/include/ntp",
       "$LOCATION_LOCATOR_ROOT/include",
     ]
 
@@ -251,6 +264,11 @@ if (location_feature_with_gnss) {
       defines += [ "TIME_SERVICE_ENABLE" ]
     }
 
+    if (net_manager_enable) {
+      external_deps += [ "netmanager_base:net_conn_manager_if" ]
+      defines += [ "NET_MANAGER_ENABLE" ]
+    }
+
     part_name = "location"
     subsystem_name = "location"
   }
diff --git a/services/location_gnss/gnss/include/gnss_ability.h b/services/location_gnss/gnss/include/gnss_ability.h
index 7ed162f9..008b569b 100644
--- a/services/location_gnss/gnss/include/gnss_ability.h
+++ b/services/location_gnss/gnss/include/gnss_ability.h
@@ -45,6 +45,10 @@
 #include "geofence_event_callback.h"
 #include "ipc_skeleton.h"
 
+#ifdef TIME_SERVICE_ENABLE
+#include "time_manager.h"
+#endif
+
 namespace OHOS {
 namespace Location {
 #ifdef __aarch64__
@@ -213,6 +217,8 @@ public:
     LocationErrCode SendNetworkLocation(const std::unique_ptr<Location>& location) override;
     LocationErrCode InjectLocation();
     LocationErrCode InjectTime();
+    LocationErrCode UpdateNtpTime(int64_t ntpTime, int64_t elapsedTime);
+    void MonitorNetwork();
 
 private:
     bool Init();
@@ -253,6 +259,9 @@ private:
     sptr<IGnssInterface> gnssInterface_;
     sptr<IGnssCallback> gnssCallback_;
     Location nlpLocation_;
+#ifdef TIME_SERVICE_ENABLE
+    TimeManager ntpTime_;
+#endif
 #ifdef HDF_DRIVERS_INTERFACE_AGNSS_ENABLE
     sptr<IAGnssCallback> agnssCallback_;
     sptr<IAGnssInterface> agnssInterface_;
diff --git a/services/location_gnss/gnss/include/ntp/elapsed_real_time_check.h b/services/location_gnss/gnss/include/ntp/elapsed_real_time_check.h
new file mode 100644
index 00000000..f7591b98
--- /dev/null
+++ b/services/location_gnss/gnss/include/ntp/elapsed_real_time_check.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ELAPSED_REAL_TIME_CHECK_H
+#define ELAPSED_REAL_TIME_CHECK_H
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+
+#include <cstdint>
+
+namespace OHOS {
+namespace Location {
+class ElapsedRealTimeCheck {
+public:
+    static ElapsedRealTimeCheck* GetInstance();
+    void CheckRealTime(int64_t time);
+    bool CanTrustElapsedRealTime();
+
+private:
+    ElapsedRealTimeCheck();
+    ~ElapsedRealTimeCheck();
+
+    int64_t timeBegin_;
+    int64_t timeBeginElapsed_;
+    int64_t timeCheck_;
+    int64_t timeCheckElapsed_;
+    bool canTrustElapsedRealTime_ = true; // default is true, usually we trust this time.
+};
+} // namespace Location
+} // namespace OHOS
+
+#endif // TIME_SERVICE_ENABLE
+#endif // FEATURE_GNSS_SUPPORT
+#endif // ELAPSED_REAL_TIME_CHECK_H
diff --git a/services/location_gnss/gnss/include/ntp/gps_time_manager.h b/services/location_gnss/gnss/include/ntp/gps_time_manager.h
new file mode 100644
index 00000000..ebcc0f8b
--- /dev/null
+++ b/services/location_gnss/gnss/include/ntp/gps_time_manager.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GPS_TIME_MANAGER_H
+#define GPS_TIME_MANAGER_H
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+
+#include "time_manager.h"
+
+namespace OHOS {
+namespace Location {
+class GpsTimeManager {
+public:
+    GpsTimeManager();
+    ~GpsTimeManager();
+    int64_t GetGpsTime();
+    void SetGpsTime(int64_t gpsTime, int64_t bootTimeMs);
+
+private:
+    bool CheckValid(int64_t gpsTime, int64_t lastSystemTime);
+    TimeManager timeManager_;
+    bool validFlag_ {false};
+    int64_t lastSystemTime_;
+};
+} // namespace Location
+} // namespace OHOS
+
+#endif // TIME_SERVICE_ENABLE
+#endif // FEATURE_GNSS_SUPPORT
+#endif // GPS_TIME_MANAGER_H
diff --git a/services/location_gnss/gnss/include/ntp/net_conn_observer.h b/services/location_gnss/gnss/include/ntp/net_conn_observer.h
new file mode 100644
index 00000000..81bd53b8
--- /dev/null
+++ b/services/location_gnss/gnss/include/ntp/net_conn_observer.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef NETMANAGER_BASE_NET_CONN_CALLBACK_OBSERVER_H
+#define NETMANAGER_BASE_NET_CONN_CALLBACK_OBSERVER_H
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef NET_MANAGER_ENABLE
+
+#include "net_all_capabilities.h"
+#include "net_conn_callback_stub.h"
+
+namespace OHOS {
+namespace Location {
+class NetConnObserver : public NetManagerStandard::NetConnCallbackStub {
+public:
+    int32_t NetAvailable(sptr<NetManagerStandard::NetHandle> &netHandle) override;
+
+    int32_t NetCapabilitiesChange(sptr<NetManagerStandard::NetHandle> &netHandle,
+        const sptr<NetManagerStandard::NetAllCapabilities> &netAllCap) override;
+
+    int32_t NetConnectionPropertiesChange(sptr<NetManagerStandard::NetHandle> &netHandle,
+        const sptr<NetManagerStandard::NetLinkInfo> &info) override;
+
+    int32_t NetLost(sptr<NetManagerStandard::NetHandle> &netHandle) override;
+
+    int32_t NetUnavailable() override;
+
+    int32_t NetBlockStatusChange(sptr<NetManagerStandard::NetHandle> &netHandle, bool blocked) override;
+};
+} // namespace Location
+} // namespace OHOS
+
+#endif
+#endif // NET_MANAGER_ENABLE
+#endif // NETMANAGER_BASE_NET_CONN_CALLBACK_OBSERVER_H
diff --git a/services/location_gnss/gnss/include/ntp/ntp_time_check.h b/services/location_gnss/gnss/include/ntp/ntp_time_check.h
new file mode 100644
index 00000000..85ac8ea0
--- /dev/null
+++ b/services/location_gnss/gnss/include/ntp/ntp_time_check.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GPS_NTP_TIME_CHECK_H
+#define GPS_NTP_TIME_CHECK_H
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+
+#include "gps_time_manager.h"
+
+namespace OHOS {
+namespace Location {
+const int64_t DEFAULT_UNCERTAINTY = 30;
+class NtpTimeCheck {
+public:
+    static NtpTimeCheck* GetInstance();
+    bool CheckNtpTime(int64_t ntpMsTime, int64_t msTimeSynsBoot);
+    int GetUncertainty();
+    void SetGpsTime(int64_t gpsMsTime, int64_t bootTimeMs);
+
+private:
+    NtpTimeCheck();
+    ~NtpTimeCheck();
+    bool CompareTime(int64_t currentNtpTime, int64_t compareTime);
+    GpsTimeManager gpsTimeManager_;
+    int difference_ = DEFAULT_UNCERTAINTY;
+};
+} // namespace Location
+} // namespace OHOS
+
+#endif // TIME_SERVICE_ENABLE
+#endif // FEATURE_GNSS_SUPPORT
+#endif // GPS_NTP_TIME_CHECK_H
diff --git a/services/location_gnss/gnss/include/ntp/ntp_time_helper.h b/services/location_gnss/gnss/include/ntp/ntp_time_helper.h
new file mode 100644
index 00000000..96d27494
--- /dev/null
+++ b/services/location_gnss/gnss/include/ntp/ntp_time_helper.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef NTP_TIME_HELPER_H
+#define NTP_TIME_HELPER_H
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+
+#include <string>
+#include "time_manager.h"
+
+namespace OHOS {
+namespace Location {
+
+struct NtpTrustedTime {
+    int64_t ntpTime = 0;
+    int64_t ageMillis = 0;
+    int64_t elapsedRealTime = 0;
+};
+
+class NtpTimeHelper {
+public:
+    static NtpTimeHelper* GetInstance();
+    void RetrieveAndInjectNtpTime();
+
+private:
+    NtpTimeHelper() = default;
+    ~NtpTimeHelper() = default;
+
+    NtpTrustedTime ntpResult_;
+};
+} // namespace Location
+} // namespace OHOS
+
+#endif // TIME_SERVICE_ENABLE
+#endif // FEATURE_GNSS_SUPPORT
+#endif // NTP_TIME_HELPER_H
diff --git a/services/location_gnss/gnss/include/ntp/time_manager.h b/services/location_gnss/gnss/include/ntp/time_manager.h
new file mode 100644
index 00000000..21db8450
--- /dev/null
+++ b/services/location_gnss/gnss/include/ntp/time_manager.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef TIME_MANAGER_H
+#define TIME_MANAGER_H
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+
+#include <string>
+
+namespace OHOS {
+namespace Location {
+const int64_t EXPIRT_TIME = 14 * 24 * 60 * 60 * 1000L;  // 14 day, two week
+
+class TimeManager {
+public:
+    TimeManager() = default;
+    explicit TimeManager(int64_t expireTime) : expireTime_(expireTime) {}
+    ~TimeManager() = default;
+    int64_t GetCurrentTime();
+    void SetCurrentTime(int64_t msTime, int64_t msTimeSynsBoot);
+    int64_t GetTimestamp();
+
+private:
+    int64_t timestamp_ = 0;
+    int64_t timeSynsBoot_ = 0;
+    int64_t expireTime_ = EXPIRT_TIME;
+};
+} // namespace Location
+} // namespace OHOS
+
+#endif // TIME_SERVICE_ENABLE
+#endif // FEATURE_GNSS_SUPPORT
+#endif // TIME_MANAGER_H
diff --git a/services/location_gnss/gnss/source/gnss_ability.cpp b/services/location_gnss/gnss/source/gnss_ability.cpp
index 84c851b6..86f059d8 100644
--- a/services/location_gnss/gnss/source/gnss_ability.cpp
+++ b/services/location_gnss/gnss/source/gnss_ability.cpp
@@ -52,6 +52,13 @@
 
 #ifdef TIME_SERVICE_ENABLE
 #include "time_service_client.h"
+#include "ntp_time_check.h"
+#endif
+
+#ifdef NET_MANAGER_ENABLE
+#include "net_conn_observer.h"
+#include "net_conn_client.h"
+#include "net_specifier.h"
 #endif
 
 namespace OHOS {
@@ -70,10 +77,8 @@ constexpr const char *GEOFENCE_SERVICE_NAME = "geofence_interface_service";
 constexpr const char *UNLOAD_GNSS_TASK = "gnss_sa_unload";
 const uint32_t RETRY_INTERVAL_OF_UNLOAD_SA = 4 * 60 * EVENT_INTERVAL_UNITE;
 constexpr int32_t FENCE_MAX_ID = 1000000;
-#ifdef TIME_SERVICE_ENABLE
-constexpr int DEFAULT_UNCERTAINTY = 30;
-#endif
 constexpr int NLP_FIX_VALID_TIME = 2;
+const int64_t INVALID_TIME = 0;
 }
 
 const bool REGISTER_RESULT = SystemAbility::MakeAndRegisterAbility(
@@ -106,6 +111,7 @@ GnssAbility::GnssAbility() : SystemAbility(LOCATION_GNSS_SA_ID, true)
     if (agnssNiManager != nullptr) {
         agnssNiManager->SubscribeSaStatusChangeListerner();
     }
+    MonitorNetwork();
     LBSLOGI(GNSS, "ability constructed.");
 }
 
@@ -496,26 +502,68 @@ LocationErrCode GnssAbility::SetPositionMode()
     return ERRCODE_SUCCESS;
 }
 
+void GnssAbility::MonitorNetwork()
+{
+#ifdef NET_MANAGER_ENABLE
+    NetManagerStandard::NetSpecifier netSpecifier;
+    NetManagerStandard::NetAllCapabilities netAllCapabilities;
+    netAllCapabilities.netCaps_.insert(NetManagerStandard::NetCap::NET_CAPABILITY_INTERNET);
+    netSpecifier.netCapabilities_ = netAllCapabilities;
+    sptr<NetManagerStandard::NetSpecifier> specifier =
+        new (std::nothrow) NetManagerStandard::NetSpecifier(netSpecifier);
+    if (specifier == nullptr) {
+        LBSLOGE(GNSS, "new operator error.specifier is nullptr");
+        return;
+    }
+    sptr<NetConnObserver> observer = new (std::nothrow) NetConnObserver();
+    if (observer == nullptr) {
+        LBSLOGE(GNSS, "new operator error.observer is nullptr");
+        return;
+    }
+    int ret = NetManagerStandard::NetConnClient::GetInstance().RegisterNetConnCallback(specifier, observer, 0);
+    LBSLOGI(GNSS, "RegisterNetConnCallback retcode= %{public}d", ret);
+#endif
+    return;
+}
+
 LocationErrCode GnssAbility::InjectTime()
 {
 #ifdef TIME_SERVICE_ENABLE
-    if (gnssInterface_ == nullptr) {
-        LBSLOGE(GNSS, "gnssInterface_ is nullptr");
+    LBSLOGD(GNSS, "InjectTime");
+    int64_t currentTime = ntpTime_.GetCurrentTime();
+    if (currentTime == INVALID_TIME) {
         return ERRCODE_SERVICE_UNAVAILABLE;
     }
-
-    GnssRefInfo refInfo;
-    refInfo.type = GnssRefInfoType::GNSS_REF_INFO_TIME;
-    auto wallTime = MiscServices::TimeServiceClient::GetInstance()->GetWallTimeMs();
     auto elapsedTime = MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs();
-    if (wallTime < 0 || elapsedTime < 0) {
-        LBSLOGE(GNSS, "get time failed");
+    if (elapsedTime < 0) {
+        LBSLOGE(GNSS, "get boot time failed");
         return ERRCODE_SERVICE_UNAVAILABLE;
     }
-    refInfo.time.time = wallTime;
-    refInfo.time.elapsedRealtime = elapsedTime;
-    refInfo.time.uncertaintyOfTime = DEFAULT_UNCERTAINTY;
-    gnssInterface_->SetGnssReferenceInfo(refInfo);
+    auto ntpTimeCheck = NtpTimeCheck::GetInstance();
+    if (ntpTimeCheck != nullptr && ntpTimeCheck->CheckNtpTime(currentTime, elapsedTime)) {
+        GnssRefInfo refInfo;
+        refInfo.type = GnssRefInfoType::GNSS_REF_INFO_TIME;
+        refInfo.time.time = currentTime;
+        refInfo.time.elapsedRealtime = elapsedTime;
+        refInfo.time.uncertaintyOfTime = ntpTimeCheck->GetUncertainty();
+        if (gnssInterface_ != nullptr) {
+            LBSLOGI(GNSS, "inject ntp time: %{public}s unert %{public}d",
+                std::to_string(currentTime).c_str(), ntpTimeCheck->GetUncertainty());
+            gnssInterface_->SetGnssReferenceInfo(refInfo);
+        }
+    }
+#endif
+    return ERRCODE_SUCCESS;
+}
+
+LocationErrCode GnssAbility::UpdateNtpTime(int64_t ntpTime, int64_t elapsedTime)
+{
+#ifdef TIME_SERVICE_ENABLE
+    if (ntpTime <= 0 || elapsedTime <= 0) {
+        LBSLOGE(GNSS, "failed to UpdateNtpTime");
+        return ERRCODE_SERVICE_UNAVAILABLE;
+    }
+    ntpTime_.SetCurrentTime(ntpTime, elapsedTime);
 #endif
     return ERRCODE_SUCCESS;
 }
@@ -548,7 +596,9 @@ LocationErrCode GnssAbility::InjectLocation()
     GnssRefInfo refInfo;
     refInfo.type = GnssRefInfoType::GNSS_REF_INFO_LOCATION;
     refInfo.gnssLocation.fieldValidity =
-        GnssLocationValidity::GNSS_LOCATION_LAT_VALID | GnssLocationValidity::GNSS_LOCATION_LONG_VALID;
+        GnssLocationValidity::GNSS_LOCATION_LAT_VALID |
+        GnssLocationValidity::GNSS_LOCATION_LONG_VALID |
+        GnssLocationValidity::GNSS_LOCATION_HORIZONTAL_ACCURACY_VALID;
     refInfo.gnssLocation.latitude = nlpLocation_.GetLatitude();
     refInfo.gnssLocation.longitude = nlpLocation_.GetLongitude();
     refInfo.gnssLocation.altitude = nlpLocation_.GetAltitude();
diff --git a/services/location_gnss/gnss/source/gnss_event_callback.cpp b/services/location_gnss/gnss/source/gnss_event_callback.cpp
index 2cd92ca7..fe0f7ba2 100644
--- a/services/location_gnss/gnss/source/gnss_event_callback.cpp
+++ b/services/location_gnss/gnss/source/gnss_event_callback.cpp
@@ -25,6 +25,10 @@
 #include "common_hisysevent.h"
 #include "agnss_ni_manager.h"
 
+#ifdef TIME_SERVICE_ENABLE
+#include "ntp_time_check.h"
+#include "time_service_client.h"
+#endif
 namespace OHOS {
 namespace Location {
 using namespace OHOS::HiviewDFX;
@@ -37,6 +41,17 @@ bool g_hasLocation = false;
 bool g_svIncrease = false;
 std::unique_ptr<SatelliteStatus> g_svInfo = nullptr;
 
+static void SetGpsTime(int64_t gpsTime)
+{
+#ifdef TIME_SERVICE_ENABLE
+    auto ntpTimeCheck = NtpTimeCheck::GetInstance();
+    if (ntpTimeCheck != nullptr) {
+        auto elapsedRealTime = MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs();
+        ntpTimeCheck->SetGpsTime(gpsTime, elapsedRealTime);
+    }
+#endif
+}
+
 int32_t GnssEventCallback::ReportLocation(const LocationInfo& location)
 {
     auto gnssAbility = GnssAbility::GetInstance();
@@ -80,6 +95,7 @@ int32_t GnssEventCallback::ReportLocation(const LocationInfo& location)
 #ifdef FEATURE_PASSIVE_SUPPORT
     gnssAbility->ReportLocationInfo(PASSIVE_ABILITY, locationNew);
 #endif
+    SetGpsTime(locationNew->GetTimeStamp());
     IPCSkeleton::SetCallingIdentity(identity);
     return ERR_OK;
 }
diff --git a/services/location_gnss/gnss/source/ntp/elapsed_real_time_check.cpp b/services/location_gnss/gnss/source/ntp/elapsed_real_time_check.cpp
new file mode 100644
index 00000000..b28d38fc
--- /dev/null
+++ b/services/location_gnss/gnss/source/ntp/elapsed_real_time_check.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+#include "elapsed_real_time_check.h"
+
+#include <cmath>
+#include <string>
+
+#include "common_utils.h"
+#include "location_log.h"
+#include "time_service_client.h"
+
+namespace OHOS {
+namespace Location {
+const int64_t MAX_MISS_MS = 24 * 1000;  // we only allow 24s misstake
+
+ElapsedRealTimeCheck *ElapsedRealTimeCheck::GetInstance()
+{
+    static ElapsedRealTimeCheck data;
+    return &data;
+}
+
+ElapsedRealTimeCheck::ElapsedRealTimeCheck() {}
+
+ElapsedRealTimeCheck::~ElapsedRealTimeCheck() {}
+
+void ElapsedRealTimeCheck::CheckRealTime(int64_t time)
+{
+    if (timeBegin_ == 0) {
+        timeBegin_ = time;
+        timeBeginElapsed_ = MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs();
+    } else if (timeCheck_ == 0) {
+        timeCheck_ = time;
+        timeCheckElapsed_ = MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs();
+    } else {
+        LBSLOGD(GNSS, "checkRealTime");
+    }
+
+    if ((timeBegin_ != 0) && (timeCheck_ != 0)) {
+        int64_t missTime = (timeCheck_ - timeBegin_) - (timeCheckElapsed_ - timeBeginElapsed_);
+        LBSLOGD(GNSS,
+            "checkRealTime timeBegin_:%{public}s, timeCheck_:%{public}s, timeBeginElapsed_:%{public}s, "
+            "timeCheckElapsed_:%{public}s",
+            std::to_string(timeBegin_).c_str(), std::to_string(timeCheck_).c_str(),
+            std::to_string(timeBeginElapsed_).c_str(), std::to_string(timeCheckElapsed_).c_str());
+        LBSLOGI(GNSS, "checkRealTime missTime:%{public}s", std::to_string(missTime).c_str());
+        // we found missTime usually should not grow, results should be simillar on any moment.
+        // so if very high missTime should be problem.
+        if (std::abs(missTime) >= MAX_MISS_MS) {
+            LBSLOGI(GNSS, "checkRealTime false");
+            canTrustElapsedRealTime_ = false;
+        } else {
+            // sometimes just once system communication block, this could recover automaticly,
+            // elapsedRealtime still be ok.
+            canTrustElapsedRealTime_ = true;
+        }
+        timeCheck_ = 0;
+        timeCheckElapsed_ = 0;
+    }
+}
+
+bool ElapsedRealTimeCheck::CanTrustElapsedRealTime()
+{
+    return canTrustElapsedRealTime_;
+}
+
+}  // namespace Location
+}  // namespace OHOS
+#endif  // TIME_SERVICE_ENABLE
+#endif
diff --git a/services/location_gnss/gnss/source/ntp/gps_time_manager.cpp b/services/location_gnss/gnss/source/ntp/gps_time_manager.cpp
new file mode 100644
index 00000000..0349e47a
--- /dev/null
+++ b/services/location_gnss/gnss/source/ntp/gps_time_manager.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+
+#include "gps_time_manager.h"
+
+#include "elapsed_real_time_check.h"
+#include "location_log.h"
+#include "time_service_client.h"
+
+namespace OHOS {
+namespace Location {
+const int64_t INVALID_TIME = 0L;
+const int64_t MAX_MISSTAKE_TIME = 10 * 1000L;
+
+GpsTimeManager::GpsTimeManager()
+{
+    timeManager_ = TimeManager(EXPIRT_TIME);
+}
+
+GpsTimeManager::~GpsTimeManager() {}
+
+bool GpsTimeManager::CheckValid(int64_t gpsTime, int64_t lastSystemTime)
+{
+    int64_t bootTimeDiff = gpsTime - timeManager_.GetTimestamp();
+    int64_t systemTimeDiff = MiscServices::TimeServiceClient::GetInstance()->GetWallTimeMs() - lastSystemTime;
+    if (abs(bootTimeDiff - systemTimeDiff) > MAX_MISSTAKE_TIME) {
+        return false;
+    }
+    return true;
+}
+
+int64_t GpsTimeManager::GetGpsTime()
+{
+    int64_t tmpTime = timeManager_.GetCurrentTime();
+    if ((!validFlag_) && (tmpTime > 0)) {
+        if (!CheckValid(tmpTime, lastSystemTime_)) {
+            return INVALID_TIME;
+        }
+    }
+    return tmpTime;
+}
+
+void GpsTimeManager::SetGpsTime(int64_t gpsMsTime, int64_t bootTimeMs)
+{
+    validFlag_ = true;
+    lastSystemTime_ = MiscServices::TimeServiceClient::GetInstance()->GetWallTimeMs();
+    timeManager_.SetCurrentTime(gpsMsTime, bootTimeMs);
+    auto elapsedRealTimeCheck = ElapsedRealTimeCheck::GetInstance();
+    if (elapsedRealTimeCheck != nullptr) {
+        elapsedRealTimeCheck->CheckRealTime(gpsMsTime);
+    }
+}
+
+}  // namespace Location
+}  // namespace OHOS
+#endif // TIME_SERVICE_ENABLE
+#endif
diff --git a/services/location_gnss/gnss/source/ntp/net_conn_observer.cpp b/services/location_gnss/gnss/source/ntp/net_conn_observer.cpp
new file mode 100644
index 00000000..1f005ff9
--- /dev/null
+++ b/services/location_gnss/gnss/source/ntp/net_conn_observer.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef NET_MANAGER_ENABLE
+#include "net_conn_observer.h"
+
+#include "location_log.h"
+#include "ntp_time_helper.h"
+
+using namespace OHOS::NetManagerStandard;
+
+namespace OHOS {
+namespace Location {
+int32_t NetConnObserver::NetAvailable(sptr<NetHandle> &netHandle)
+{
+    return ERR_OK;
+}
+
+int32_t NetConnObserver::NetCapabilitiesChange(sptr<NetHandle> &netHandle,
+    const sptr<NetAllCapabilities> &netAllCap)
+{
+    LBSLOGI(GNSS, "Observe network capabilities change");
+    if (netAllCap->netCaps_.count(NetCap::NET_CAPABILITY_INTERNET)) {
+#ifdef TIME_SERVICE_ENABLE
+        auto npTimeHelper = NtpTimeHelper::GetInstance();
+        if (npTimeHelper != nullptr) {
+            npTimeHelper->RetrieveAndInjectNtpTime();
+        }
+#endif
+    }
+    return ERR_OK;
+}
+
+int32_t NetConnObserver::NetConnectionPropertiesChange(sptr<NetHandle> &netHandle,
+    const sptr<NetLinkInfo> &info)
+{
+    return ERR_OK;
+}
+
+int32_t NetConnObserver::NetLost(sptr<NetHandle> &netHandle)
+{
+    return ERR_OK;
+}
+
+int32_t NetConnObserver::NetUnavailable()
+{
+    return ERR_OK;
+}
+
+int32_t NetConnObserver::NetBlockStatusChange(sptr<NetHandle> &netHandle, bool blocked)
+{
+    return ERR_OK;
+}
+} // namespace Location
+} // namespace OHOS
+
+#endif
+#endif
\ No newline at end of file
diff --git a/services/location_gnss/gnss/source/ntp/ntp_time_check.cpp b/services/location_gnss/gnss/source/ntp/ntp_time_check.cpp
new file mode 100644
index 00000000..fcea116f
--- /dev/null
+++ b/services/location_gnss/gnss/source/ntp/ntp_time_check.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+#include "ntp_time_check.h"
+
+#include <cmath>
+#include <string>
+
+#include "common_utils.h"
+#include "location_log.h"
+#include "time_service_client.h"
+
+namespace OHOS {
+namespace Location {
+const int64_t INVALID_TIME = 0;
+const int64_t MISSTAKE_TIME = 50 * 1000;  // 50s
+
+NtpTimeCheck::NtpTimeCheck() {}
+
+NtpTimeCheck::~NtpTimeCheck() {}
+
+NtpTimeCheck *NtpTimeCheck::GetInstance()
+{
+    static NtpTimeCheck data;
+    return &data;
+}
+
+bool NtpTimeCheck::CheckNtpTime(int64_t ntpMsTime, int64_t msTimeSynsBoot)
+{
+    int64_t currentNtpTime =
+        ntpMsTime + MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs() - msTimeSynsBoot;
+    if (gpsTimeManager_.GetGpsTime() != INVALID_TIME) {
+        return CompareTime(currentNtpTime, gpsTimeManager_.GetGpsTime());
+    }
+
+    LBSLOGI(GNSS, "checkNtpTime return false");
+    return false;
+}
+
+bool NtpTimeCheck::CompareTime(int64_t currentNtpTime, int64_t compareTime)
+{
+    LBSLOGI(GNSS, "compareTime currentNtpTime:%{public}s, compareTime:%{public}s",
+        std::to_string(currentNtpTime).c_str(), std::to_string(compareTime).c_str());
+    int64_t misstake = std::abs(currentNtpTime - compareTime);
+    if (misstake > MISSTAKE_TIME) {
+        LBSLOGI(GNSS, "find error ntp time:%{public}s", std::to_string(misstake).c_str());
+        return false;
+    } else {
+        difference_ = misstake;
+        return true;
+    }
+}
+
+void NtpTimeCheck::SetGpsTime(int64_t gpsMsTime, int64_t bootTimeMs)
+{
+    if (gpsMsTime <= 0 || bootTimeMs <= 0) {
+        LBSLOGE(GNSS, "set gps time failed :%{public}s, %{public}s", std::to_string(gpsMsTime).c_str(),
+            std::to_string(bootTimeMs).c_str());
+        return;
+    }
+    gpsTimeManager_.SetGpsTime(gpsMsTime, bootTimeMs);
+}
+
+int NtpTimeCheck::GetUncertainty()
+{
+    return (difference_ > DEFAULT_UNCERTAINTY) ? difference_ : DEFAULT_UNCERTAINTY;
+}
+
+}  // namespace Location
+}  // namespace OHOS
+#endif  // TIME_SERVICE_ENABLE
+#endif
diff --git a/services/location_gnss/gnss/source/ntp/ntp_time_helper.cpp b/services/location_gnss/gnss/source/ntp/ntp_time_helper.cpp
new file mode 100644
index 00000000..1f401746
--- /dev/null
+++ b/services/location_gnss/gnss/source/ntp/ntp_time_helper.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+#include "ntp_time_helper.h"
+
+#include <string>
+#include "gnss_ability.h"
+#include "location_log.h"
+#include "ntp_time_check.h"
+#include "time_service_client.h"
+
+namespace OHOS {
+namespace Location {
+static const int64_t NTP_INTERVAL = 24 * 60 * 60 * 1000;
+
+NtpTimeHelper *NtpTimeHelper::GetInstance()
+{
+    static NtpTimeHelper data;
+    return &data;
+}
+
+void NtpTimeHelper::RetrieveAndInjectNtpTime()
+{
+    if (ntpResult_.elapsedRealTime > 0) {
+        ntpResult_.ageMillis =
+            MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs() - ntpResult_.elapsedRealTime;
+        LBSLOGD(GNSS, "ntp age millis %{public}s", std::to_string(ntpResult_.ageMillis).c_str());
+    }
+
+    auto gnssAbility = GnssAbility::GetInstance();
+    if (ntpResult_.ntpTime == 0 || ntpResult_.ageMillis > NTP_INTERVAL) {
+        auto ret = MiscServices::TimeServiceClient::GetInstance()->GetNtpTimeMs(ntpResult_.ntpTime);
+        if (ret != ERR_OK) {
+            ntpResult_.ntpTime = 0;
+            LBSLOGE(GNSS, "failed to get ntp time %{public}d", ret);
+            return;
+        }
+        LBSLOGI(GNSS, "get ntp time %{public}s", std::to_string(ntpResult_.ntpTime).c_str());
+        ntpResult_.elapsedRealTime = MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs();
+        ntpResult_.ageMillis = 0;
+        if (gnssAbility != nullptr) {
+            gnssAbility->UpdateNtpTime(ntpResult_.ntpTime, ntpResult_.elapsedRealTime);
+        }
+    }
+    if (gnssAbility != nullptr) {
+        gnssAbility->InjectTime();
+    }
+}
+
+}  // namespace Location
+}  // namespace OHOS
+#endif // TIME_SERVICE_ENABLE
+#endif
diff --git a/services/location_gnss/gnss/source/ntp/time_manager.cpp b/services/location_gnss/gnss/source/ntp/time_manager.cpp
new file mode 100644
index 00000000..3d625c6c
--- /dev/null
+++ b/services/location_gnss/gnss/source/ntp/time_manager.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef FEATURE_GNSS_SUPPORT
+#ifdef TIME_SERVICE_ENABLE
+#include "time_manager.h"
+
+#include <string>
+#include "common_utils.h"
+#include "elapsed_real_time_check.h"
+#include "location_log.h"
+#include "time_service_client.h"
+
+namespace OHOS {
+namespace Location {
+const int64_t INVALID_TIME = 0;
+const int64_t GPS_UTC_REFERENCE_TIME = 946656000;  // 946656000:UTC time of 2000-01-01 00:00:00
+
+int64_t TimeManager::GetCurrentTime()
+{
+    LBSLOGI(GNSS, "beginning timestamp_ is %{public}s", std::to_string(timestamp_).c_str());
+    if (timestamp_ < GPS_UTC_REFERENCE_TIME) {
+        return INVALID_TIME;
+    }
+    if (!ElapsedRealTimeCheck::GetInstance()->CanTrustElapsedRealTime()) {
+        LBSLOGI(GNSS, "getCurrentTime ElapsedRealTime INVALID_TIME");
+        return INVALID_TIME;
+    }
+
+    int64_t timeTillNow = MiscServices::TimeServiceClient::GetInstance()->GetBootTimeMs() - timeSynsBoot_;
+    if (timeTillNow >= expireTime_) {
+        LBSLOGI(GNSS, "getCurrentTime INVALID_TIME");
+        return INVALID_TIME;
+    } else {
+        LBSLOGI(GNSS, "getCurrentTime:%{public}s", std::to_string(timestamp_ + timeTillNow).c_str());
+        return timestamp_ + timeTillNow;
+    }
+}
+
+void TimeManager::SetCurrentTime(int64_t msTime, int64_t msTimeSynsBoot)
+{
+    timestamp_ = msTime;
+    timeSynsBoot_ = msTimeSynsBoot;
+    LBSLOGI(GNSS, "setCurrentTime timestamp_:%{public}s,  mTimeReference:%{public}s",
+        std::to_string(timestamp_).c_str(), std::to_string(timeSynsBoot_).c_str());
+}
+
+int64_t TimeManager::GetTimestamp()
+{
+    return timestamp_;
+}
+
+}  // namespace Location
+}  // namespace OHOS
+#endif  // TIME_SERVICE_ENABLE
+#endif
diff --git a/test/location_gnss/BUILD.gn b/test/location_gnss/BUILD.gn
index d110a399..81674dce 100644
--- a/test/location_gnss/BUILD.gn
+++ b/test/location_gnss/BUILD.gn
@@ -26,6 +26,7 @@ if (location_feature_with_gnss) {
       "$GNSS_UNIT_TEST_DIR/source/gnss_ability_test.cpp",
       "$GNSS_UNIT_TEST_DIR/source/gnss_event_callback_test.cpp",
       "$GNSS_UNIT_TEST_DIR/source/gnss_interface_test.cpp",
+      "$GNSS_UNIT_TEST_DIR/source/ntp_time_test.cpp",
       "$LOCATION_ROOT_DIR/test/mock/src/mock_service_registry.cpp",
     ]
 
diff --git a/test/location_gnss/include/ntp_time_test.h b/test/location_gnss/include/ntp_time_test.h
new file mode 100644
index 00000000..2cb9b3a7
--- /dev/null
+++ b/test/location_gnss/include/ntp_time_test.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef NTP_TIME_TEST_H
+#define NTP_TIME_TEST_H
+
+#include <gtest/gtest.h>
+
+namespace OHOS {
+namespace Location {
+class NtpTimeTest : public testing::Test {
+public:
+    void SetUp();
+    void TearDown();
+};
+} // namespace Location
+} // namespace OHOS
+#endif // NTP_TIME_TEST_H
\ No newline at end of file
diff --git a/test/location_gnss/source/ntp_time_test.cpp b/test/location_gnss/source/ntp_time_test.cpp
new file mode 100644
index 00000000..6ede55ac
--- /dev/null
+++ b/test/location_gnss/source/ntp_time_test.cpp
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ntp_time_test.h"
+
+#include "location_log.h"
+#include "ntp_time_check.h"
+
+using namespace testing::ext;
+namespace OHOS {
+namespace Location {
+void NtpTimeTest::SetUp()
+{
+}
+
+void NtpTimeTest::TearDown()
+{
+}
+
+HWTEST_F(NtpTimeTest, NtpTimeCheckSetGpsTimeTest001, TestSize.Level1)
+{
+    GTEST_LOG_(INFO)
+        << "NtpTimeTest, NtpTimeCheckSetGpsTimeTest001, TestSize.Level1";
+    LBSLOGI(GNSS_TEST, "[NtpTimeTest] NtpTimeCheckSetGpsTimeTest001 begin");
+    auto ntpTimeCheck = NtpTimeCheck::GetInstance();
+    EXPECT_NE(nullptr, ntpTimeCheck);
+    int64_t gpsMsTime = -1;
+    int64_t bootTimeMs = -1;
+    ntpTimeCheck->SetGpsTime(gpsMsTime, bootTimeMs);
+    LBSLOGI(GNSS_TEST, "[NtpTimeTest] NtpTimeCheckSetGpsTimeTest001 end");
+}
+
+HWTEST_F(NtpTimeTest, NtpTimeCheckCheckNtpTimeTest001, TestSize.Level1)
+{
+    GTEST_LOG_(INFO)
+        << "NtpTimeTest, NtpTimeCheckCheckNtpTimeTest001, TestSize.Level1";
+    LBSLOGI(GNSS_TEST, "[NtpTimeTest] NtpTimeCheckCheckNtpTimeTest001 begin");
+    auto ntpTimeCheck = NtpTimeCheck::GetInstance();
+    EXPECT_NE(nullptr, ntpTimeCheck);
+    int64_t gpsMsTime = 1720522730000;
+    int64_t bootTimeMs = 1;
+    ntpTimeCheck->SetGpsTime(gpsMsTime, bootTimeMs);
+    int64_t ntpMsTime = 1720522730000;
+    int64_t msTimeSynsBoot = 1;
+    ntpTimeCheck->CheckNtpTime(ntpMsTime, msTimeSynsBoot);
+    LBSLOGI(GNSS_TEST, "[NtpTimeTest] NtpTimeCheckCheckNtpTimeTest001 end");
+}
+
+}
+}
\ No newline at end of file