diff --git a/frameworks/inputmethod_ability/src/input_method_core_proxy.cpp b/frameworks/inputmethod_ability/src/input_method_core_proxy.cpp
index 9e24df4..3adc7d5 100644
--- a/frameworks/inputmethod_ability/src/input_method_core_proxy.cpp
+++ b/frameworks/inputmethod_ability/src/input_method_core_proxy.cpp
@@ -32,6 +32,11 @@ namespace MiscServices {
                                                   sptr<IInputControlChannel> &inputControlChannel)
     {
         IMSA_HILOGI("InputMethodCoreProxy::initializeInput");
+        auto remote = Remote();
+        if (remote == nullptr) {
+            IMSA_HILOGI("remote is nullptr");
+            return ErrorCode::ERROR_NULL_POINTER;
+        }
         if (startInputToken == nullptr) {
             IMSA_HILOGI("InputMethodCoreProxy::initializeInput startInputToken is nullptr");
         }
@@ -56,7 +61,7 @@ namespace MiscServices {
         MessageOption option {
             MessageOption::TF_SYNC
         };
-        int32_t status = Remote()->SendRequest(INITIALIZE_INPUT, data, reply, option);
+        int32_t status = remote->SendRequest(INITIALIZE_INPUT, data, reply, option);
         if (status != ErrorCode::NO_ERROR) {
             IMSA_HILOGI("InputMethodCoreProxy::initializeInput status = %{public}d", status);
             return status;
@@ -68,7 +73,11 @@ namespace MiscServices {
     int32_t InputMethodCoreProxy::InitInputControlChannel(sptr<IInputControlChannel> &inputControlChannel)
     {
         IMSA_HILOGI("InputMethodCoreProxy::InitInputControlChannel");
-
+        auto remote = Remote();
+        if (remote == nullptr) {
+            IMSA_HILOGI("remote is nullptr");
+            return ErrorCode::ERROR_NULL_POINTER;
+        }
         if (inputControlChannel == nullptr) {
             IMSA_HILOGI("InputMethodCoreProxy::InitInputControlChannel inputControlChannel is nullptr");
             return ErrorCode::ERROR_EX_NULL_POINTER;
@@ -84,7 +93,7 @@ namespace MiscServices {
         MessageOption option {
             MessageOption::TF_SYNC
         };
-        int32_t status = Remote()->SendRequest(INIT_INPUT_CONTROL_CHANNEL, data, reply, option);
+        int32_t status = remote->SendRequest(INIT_INPUT_CONTROL_CHANNEL, data, reply, option);
         if (status != ErrorCode::NO_ERROR) {
             IMSA_HILOGI("InputMethodCoreProxy::InitInputControlChannel status = %{public}d", status);
             return status;
@@ -96,6 +105,11 @@ namespace MiscServices {
     void InputMethodCoreProxy::SetClientState(bool state)
     {
         IMSA_HILOGI("InputMethodCoreProxy::SetClientState");
+        auto remote = Remote();
+        if (remote == nullptr) {
+            IMSA_HILOGI("remote is nullptr");
+            return;
+        }
         MessageParcel data;
         if (!(data.WriteInterfaceToken(GetDescriptor())
             && data.WriteBool(state))) {
@@ -107,7 +121,7 @@ namespace MiscServices {
             MessageOption::TF_SYNC
         };
 
-        int32_t status = Remote()->SendRequest(SET_CLIENT_STATE, data, reply, option);
+        int32_t status = remote->SendRequest(SET_CLIENT_STATE, data, reply, option);
         if (status != ErrorCode::NO_ERROR) {
             IMSA_HILOGI("InputMethodCoreProxy::SetClientState status = %{public}d", status);
         }
@@ -116,6 +130,11 @@ namespace MiscServices {
                                           const InputAttribute& editorAttribute, bool supportPhysicalKbd)
     {
         IMSA_HILOGI("InputMethodCoreProxy::startInput");
+        auto remote = Remote();
+        if (remote == nullptr) {
+            IMSA_HILOGI("remote is nullptr");
+            return false;
+        }
         if (inputDataChannel == nullptr) {
             IMSA_HILOGI("InputMethodCoreProxy::startInput inputDataChannel is nullptr");
         }
@@ -133,7 +152,7 @@ namespace MiscServices {
             MessageOption::TF_SYNC
         };
 
-        int32_t status = Remote()->SendRequest(START_INPUT, data, reply, option);
+        int32_t status = remote->SendRequest(START_INPUT, data, reply, option);
         if (status != ErrorCode::NO_ERROR) {
             IMSA_HILOGI("InputMethodCoreProxy::startInput status = %{public}d", status);
             return false;
@@ -146,12 +165,17 @@ namespace MiscServices {
     int32_t InputMethodCoreProxy::stopInput()
     {
         IMSA_HILOGI("InputMethodCoreProxy::stopInput");
+        auto remote = Remote();
+        if (remote == nullptr) {
+            IMSA_HILOGI("remote is nullptr");
+            return ErrorCode::ERROR_NULL_POINTER;
+        }
         MessageParcel data, reply;
         data.WriteInterfaceToken(GetDescriptor());
         MessageOption option {
             MessageOption::TF_SYNC
         };
-        int32_t status = Remote()->SendRequest(STOP_INPUT, data, reply, option);
+        int32_t status = remote->SendRequest(STOP_INPUT, data, reply, option);
         if (status != ErrorCode::NO_ERROR) {
             IMSA_HILOGI("InputMethodCoreProxy::stopInput status = %{public}d", status);
             return status;
@@ -193,7 +217,6 @@ namespace MiscServices {
     void InputMethodCoreProxy::StopInputService(std::string imeId)
     {
         IMSA_HILOGI("InputMethodCoreProxy::StopInputService");
-
         auto remote = Remote();
         if (remote == nullptr) {
             IMSA_HILOGI("InputMethodCoreProxy::StopInputService remote is nullptr");
@@ -242,13 +265,18 @@ namespace MiscServices {
     int32_t InputMethodCoreProxy::setKeyboardType(const KeyboardType& type)
     {
         IMSA_HILOGI("InputMethodCoreProxy::setKeyboardType");
+        auto remote = Remote();
+        if (remote == nullptr) {
+            IMSA_HILOGI("remote is nullptr");
+            return ErrorCode::ERROR_NULL_POINTER;
+        }
         MessageParcel data, reply;
         data.WriteInterfaceToken(GetDescriptor());
         data.WriteParcelable(&type);
         MessageOption option {
             MessageOption::TF_SYNC
         };
-        int32_t status = Remote()->SendRequest(SET_KEYBOARD_TYPE, data, reply, option);
+        int32_t status = remote->SendRequest(SET_KEYBOARD_TYPE, data, reply, option);
         if (status != ErrorCode::NO_ERROR) {
             return status;
         }
@@ -259,12 +287,17 @@ namespace MiscServices {
     int32_t InputMethodCoreProxy::getKeyboardWindowHeight(int32_t retHeight)
     {
         IMSA_HILOGI("InputMethodCoreProxy::getKeyboardWindowHeight");
+        auto remote = Remote();
+        if (remote == nullptr) {
+            IMSA_HILOGI("remote is nullptr");
+            return ErrorCode::ERROR_NULL_POINTER;
+        }
         MessageParcel data, reply;
         data.WriteInterfaceToken(GetDescriptor());
         MessageOption option {
             MessageOption::TF_SYNC
         };
-        int32_t status = Remote()->SendRequest(GET_KEYBOARD_WINDOW_HEIGHT, data, reply, option);
+        int32_t status = remote->SendRequest(GET_KEYBOARD_WINDOW_HEIGHT, data, reply, option);
         if (status != ErrorCode::NO_ERROR) {
             return status;
         }