diff --git a/interfaces/kits/js/napi/system_time/src/js_systemtime.cpp b/interfaces/kits/js/napi/system_time/src/js_systemtime.cpp
index d31c0fa..4eace67 100644
--- a/interfaces/kits/js/napi/system_time/src/js_systemtime.cpp
+++ b/interfaces/kits/js/napi/system_time/src/js_systemtime.cpp
@@ -169,6 +169,10 @@ napi_value JSSystemTimeSetTime(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void *data) {
             AsyncContext *asyncContext = (AsyncContext*)data;
+            if (asyncContext == nullptr) {
+                return;
+            }
+
             if (!asyncContext->isOK) {
                 asyncContext->errorCode = ERROR;
             }
@@ -181,10 +185,8 @@ napi_value JSSystemTimeSetTime(napi_env env, napi_callback_info info)
             napi_get_null(env, &result);
             TimeReturnCallbackPromise(env, info, result);
             napi_delete_async_work(env, asyncContext->work);
-            if (asyncContext) {
-                delete asyncContext;
-                asyncContext = nullptr;
-            }
+            delete asyncContext;
+            asyncContext = nullptr;
         },
         (void*)asyncContext,
         &asyncContext->work);
@@ -249,6 +251,9 @@ napi_value JSSystemTimeSetTimeZone(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void *data) {
             AsyncContext *asyncContext = (AsyncContext*)data;
+            if (asyncContext == nullptr) {
+                return;
+            }
             if (!asyncContext->isOK) {
                 asyncContext->errorCode = ERROR;
             }
@@ -261,10 +266,8 @@ napi_value JSSystemTimeSetTimeZone(napi_env env, napi_callback_info info)
             napi_get_null(env, &result);
             TimeReturnCallbackPromise(env, info, result);
             napi_delete_async_work(env, asyncContext->work);
-            if (asyncContext) {
-                delete asyncContext;
-                asyncContext = nullptr;
-            }
+            delete asyncContext;
+            asyncContext = nullptr;
         },
         (void*)asyncContext,
         &asyncContext->work);
@@ -339,6 +342,9 @@ napi_value JSSystemTimeGetCurrentTime(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void* data) {
             AsyncContext* asyncContext = (AsyncContext*)data;
+            if (asyncContext == nullptr) {
+                return;
+            }
             if (asyncContext->time < 0) {
             }
             TimeCallbackPromiseInfo info;
@@ -350,10 +356,8 @@ napi_value JSSystemTimeGetCurrentTime(napi_env env, napi_callback_info info)
             napi_create_int64(env, asyncContext->time, &result);
             TimeReturnCallbackPromise(env, info, result);
             napi_delete_async_work(env, asyncContext->work);
-            if (asyncContext) {
-                delete asyncContext;
-                asyncContext = nullptr;
-            }
+            delete asyncContext;
+            asyncContext = nullptr;
         },
         (void*)asyncContext,
         &asyncContext->work);
@@ -398,6 +402,9 @@ napi_value JSSystemTimeGetRealActiveTime(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void* data) {
             AsyncContext* asyncContext = (AsyncContext*)data;
+            if (asyncContext == nullptr) {
+                return;
+            }
             if (asyncContext->time < 0) {
                 asyncContext->errorCode = ERROR;
             }
@@ -410,10 +417,8 @@ napi_value JSSystemTimeGetRealActiveTime(napi_env env, napi_callback_info info)
             napi_create_int64(env, asyncContext->time, &result);
             TimeReturnCallbackPromise(env, info, result);
             napi_delete_async_work(env, asyncContext->work);
-            if (asyncContext) {
-                delete asyncContext;
-                asyncContext = nullptr;
-            }
+            delete asyncContext;
+            asyncContext = nullptr;
         },
         (void*)asyncContext,
         &asyncContext->work);
@@ -458,6 +463,9 @@ napi_value JSSystemTimeGetRealTime(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void* data) {
             AsyncContext* asyncContext = (AsyncContext*)data;
+            if (asyncContext == nullptr) {
+                return;
+            }
             if (asyncContext->time < 0) {
                 asyncContext->errorCode = ERROR;
             }
@@ -470,10 +478,8 @@ napi_value JSSystemTimeGetRealTime(napi_env env, napi_callback_info info)
             napi_create_int64(env, asyncContext->time, &result);
             TimeReturnCallbackPromise(env, info, result);
             napi_delete_async_work(env, asyncContext->work);
-            if (asyncContext) {
-                delete asyncContext;
-                asyncContext = nullptr;
-            }
+            delete asyncContext;
+            asyncContext = nullptr;
         },
         (void*)asyncContext,
         &asyncContext->work);
@@ -512,6 +518,9 @@ napi_value JSSystemTimeGetDate(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void* data) {
             AsyncContext* asyncContext = (AsyncContext*)data;
+            if (asyncContext == nullptr) {
+                return;
+            }
             if (asyncContext->time < 0) {
                 asyncContext->errorCode = ERROR;
             }
@@ -528,10 +537,8 @@ napi_value JSSystemTimeGetDate(napi_env env, napi_callback_info info)
             napi_run_script(env, script, &result);
             TimeReturnCallbackPromise(env, info, result);
             napi_delete_async_work(env, asyncContext->work);
-            if (asyncContext) {
-                delete asyncContext;
-                asyncContext = nullptr;
-            }
+            delete asyncContext;
+            asyncContext = nullptr;
         },
         (void*)asyncContext,
         &asyncContext->work);
@@ -571,6 +578,9 @@ napi_value JSSystemTimeGetTimeZone(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void* data) {
             AsyncContext* asyncContext = (AsyncContext*)data;
+            if (asyncContext == nullptr) {
+                return;
+            }
             if (asyncContext->timeZone == "") {
                 asyncContext->errorCode = ERROR;
             }
@@ -583,10 +593,8 @@ napi_value JSSystemTimeGetTimeZone(napi_env env, napi_callback_info info)
             napi_create_string_utf8(env, asyncContext->timeZone.c_str(), asyncContext->timeZone.length(), &result);
             TimeReturnCallbackPromise(env, info, result);
             napi_delete_async_work(env, asyncContext->work);
-            if (asyncContext) {
-                delete asyncContext;
-                asyncContext = nullptr;
-            }
+            delete asyncContext;
+            asyncContext = nullptr;
         },
         (void*)asyncContext,
         &asyncContext->work);
diff --git a/interfaces/kits/js/napi/system_timer/src/system_timer.cpp b/interfaces/kits/js/napi/system_timer/src/system_timer.cpp
index f2e73b6..acdb950 100644
--- a/interfaces/kits/js/napi/system_timer/src/system_timer.cpp
+++ b/interfaces/kits/js/napi/system_timer/src/system_timer.cpp
@@ -488,6 +488,9 @@ napi_value StartTimer(napi_env env, napi_callback_info info)
         [](napi_env env, napi_status status, void *data) {
             AsyncCallbackInfoStart *asynccallbackinfo = (AsyncCallbackInfoStart *)data;
 
+            if (asynccallbackinfo == nullptr) {
+                return;
+            }
             if (!asynccallbackinfo->isOK) {
                 asynccallbackinfo->errorCode = ERROR;
             }
@@ -503,10 +506,8 @@ napi_value StartTimer(napi_env env, napi_callback_info info)
             ReturnCallbackPromise(env, info, result);
 
             napi_delete_async_work(env, asynccallbackinfo->asyncWork);
-            if (asynccallbackinfo) {
-                delete asynccallbackinfo;
-                asynccallbackinfo = nullptr;
-            }
+            delete asynccallbackinfo;
+            asynccallbackinfo = nullptr;
         },
         (void *)asynccallbackinfo,
         &asynccallbackinfo->asyncWork);
@@ -597,6 +598,9 @@ napi_value StopTimer(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void *data) {
             AsyncCallbackInfoStop *asynccallbackinfo = (AsyncCallbackInfoStop *)data;
+            if (asynccallbackinfo == nullptr) {
+                return;
+            }
 
             if (!asynccallbackinfo->isOK) {
                 asynccallbackinfo->errorCode = ERROR;
@@ -613,10 +617,8 @@ napi_value StopTimer(napi_env env, napi_callback_info info)
             ReturnCallbackPromise(env, info, result);
 
             napi_delete_async_work(env, asynccallbackinfo->asyncWork);
-            if (asynccallbackinfo) {
-                delete asynccallbackinfo;
-                asynccallbackinfo = nullptr;
-            }
+            delete asynccallbackinfo;
+            asynccallbackinfo = nullptr;
         },
         (void *)asynccallbackinfo,
         &asynccallbackinfo->asyncWork);
@@ -702,6 +704,9 @@ napi_value DestroyTimer(napi_env env, napi_callback_info info)
         },
         [](napi_env env, napi_status status, void *data) {
             AsyncCallbackInfoDestroy *asynccallbackinfo = (AsyncCallbackInfoDestroy *)data;
+            if (asynccallbackinfo == nullptr) {
+                return;
+            }
 
             if (asynccallbackinfo->isOK) {
                 for (auto it = asyncCallbackInfoCreateInfo.begin(); it != asyncCallbackInfoCreateInfo.end(); it++) {
@@ -726,10 +731,8 @@ napi_value DestroyTimer(napi_env env, napi_callback_info info)
             ReturnCallbackPromise(env, info, result);
 
             napi_delete_async_work(env, asynccallbackinfo->asyncWork);
-            if (asynccallbackinfo) {
-                delete asynccallbackinfo;
-                asynccallbackinfo = nullptr;
-            }
+            delete asynccallbackinfo;
+            asynccallbackinfo = nullptr;
         },
         (void *)asynccallbackinfo,
         &asynccallbackinfo->asyncWork);