diff --git a/frameworks/ets/ani/app_manager/src/ets_app_manager.cpp b/frameworks/ets/ani/app_manager/src/ets_app_manager.cpp
index 7a4779205e5fbb762c7f47c1e4a8b0c3b47e60c7..b6436e2238d83acc719849784ca6916f34e97053 100644
--- a/frameworks/ets/ani/app_manager/src/ets_app_manager.cpp
+++ b/frameworks/ets/ani/app_manager/src/ets_app_manager.cpp
@@ -98,6 +98,7 @@ public:
         ani_object observer, ani_object etsBundleNameList);
     static ani_int OnOnApplicationState(ani_env *env, ani_string type, ani_object observer);
     static void OnOff(ani_env *env, ani_string type, ani_int etsObserverId, ani_object callback);
+    static void OffApplicationStateCheck(ani_env *env, ani_int etsObserverId);
     static void OnOnAppForegroundState(ani_env *env, ani_string type, ani_object observer);
     static void OnOffAppForegroundState(ani_env *env, ani_string type, ani_object observer);
     static void OnOnAbilityFirstFrameState(
@@ -484,6 +485,26 @@ ani_int EtsAppManager::OnOnApplicationState(ani_env *env, ani_string type, ani_o
     return OnOnApplicationStateInner(env, type, observer, static_cast<ani_object>(undefined));
 }
 
+void EtsAppManager::OffApplicationStateCheck(ani_env *env, ani_int etsObserverId)
+{
+    TAG_LOGD(AAFwkTag::APPMGR, "OffApplicationStateCheck called");
+    if (env == nullptr) {
+        TAG_LOGE(AAFwkTag::APPMGR, "null env");
+        return;
+    }
+    if (appStateObserver_ == nullptr) {
+        TAG_LOGE(AAFwkTag::APPMGR, "null observer");
+        AbilityRuntime::EtsErrorUtil::ThrowInvalidParamError(env, "observer is nullptr, please register first.");
+        return;
+    }
+    int32_t observerId = static_cast<int32_t>(etsObserverId);
+    if (!appStateObserver_->FindObserverByObserverId(observerId)) {
+        TAG_LOGE(AAFwkTag::APPMGR, "not find observer:%{public}d", static_cast<int32_t>(observerId));
+        AbilityRuntime::EtsErrorUtil::ThrowInvalidParamError(env, "not find observerId.");
+        return;
+    }
+}
+
 void EtsAppManager::OnOff(ani_env *env, ani_string type, ani_int etsObserverId, ani_object callback)
 {
     TAG_LOGD(AAFwkTag::APPMGR, "OnOff called");
@@ -500,8 +521,7 @@ void EtsAppManager::OnOff(ani_env *env, ani_string type, ani_int etsObserverId,
         return;
     }
     TAG_LOGD(AAFwkTag::APPMGR, "observerId:%{public}d", etsObserverId);
-    int64_t observerId = static_cast<int64_t>(etsObserverId);
-
+    int32_t observerId = static_cast<int32_t>(etsObserverId);
     sptr<AppExecFwk::IAppMgr> appMgr = GetAppManagerInstance();
     if (appMgr == nullptr) {
         TAG_LOGE(AAFwkTag::APPMGR, "appManager null ptr");
@@ -1333,6 +1353,8 @@ void EtsAppManagerRegistryInit(ani_env *env)
             reinterpret_cast<void *>(EtsAppManager::OnOnApplicationState)},
         ani_native_function {"nativeOff", APPLICATION_STATE_OFF_SIGNATURE,
             reinterpret_cast<void *>(EtsAppManager::OnOff)},
+        ani_native_function {"nativeOffApplicationStateCheck", "I:V",
+            reinterpret_cast<void *>(EtsAppManager::OffApplicationStateCheck)},
         ani_native_function {"nativeGetAppMemorySize", nullptr,
             reinterpret_cast<void *>(EtsAppManager::GetAppMemorySize)},
         ani_native_function {"nativeIsRamConstrainedDevice", nullptr,
diff --git a/frameworks/ets/ets/@ohos.app.ability.appManager.ets b/frameworks/ets/ets/@ohos.app.ability.appManager.ets
index 836870f7f0f67317c085fb6caf0d777887962abc..5995889d83ffaa28974448b508fda4cadf525a20 100644
--- a/frameworks/ets/ets/@ohos.app.ability.appManager.ets
+++ b/frameworks/ets/ets/@ohos.app.ability.appManager.ets
@@ -225,7 +225,9 @@ export function on(type: 'applicationState', observer: ApplicationStateObserver,
 }
 
 export native function nativeOff(type:string, observerId: int, callback: AsyncCallbackWrapper<void>) : void;
+export native function nativeOffApplicationStateCheck(observerId: int): void;
 export function off(type: 'applicationState', observerId: int, callback: AsyncCallback<void>): void {
+    nativeOffApplicationStateCheck(observerId);
     let myCall = new AsyncCallbackWrapper<void>(callback);
     taskpool.execute((): void => {
       appManager.nativeOff(type, observerId, myCall);
@@ -233,6 +235,7 @@ export function off(type: 'applicationState', observerId: int, callback: AsyncCa
 }
 
 export function off(type: 'applicationState', observerId: int): Promise<void> {
+    nativeOffApplicationStateCheck(observerId);
     let p:Promise<void> = new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError | null)=>void):void => {
       let myCall = new AsyncCallbackWrapper<void>((err: BusinessError | null)=>{
         if (err == null || err.code == 0) {