diff --git a/interfaces/kits/js/napi/inputmethodengine/src/js_input_method_engine_listener.cpp b/interfaces/kits/js/napi/inputmethodengine/src/js_input_method_engine_listener.cpp
index b134ad1..305c6bb 100644
--- a/interfaces/kits/js/napi/inputmethodengine/src/js_input_method_engine_listener.cpp
+++ b/interfaces/kits/js/napi/inputmethodengine/src/js_input_method_engine_listener.cpp
@@ -64,10 +64,18 @@ namespace MiscServices {
         // should do type check
         std::lock_guard<std::recursive_mutex> lk(mapMutex);
         if (jsCbMap_.empty() || jsCbMap_.find(type) == jsCbMap_.end()) {
-            IMSA_HILOGI("methodName %{public}s not registerted!", type.c_str());
+            IMSA_HILOGI("methodName %{public}s not registered!", type.c_str());
             return;
         }
-        jsCbMap_.erase(type);
+        for (auto it = jsCbMap_[type].begin(); it != jsCbMap_[type].end();) {
+            if (value->StrictEquals((*it)->Get())) {
+                jsCbMap_[type].erase(it);
+                break;
+            }
+        }
+        if (jsCbMap_[type].empty()) {
+            jsCbMap_.erase(type);
+        }
     }
 
     bool JsInputMethodEngineListener::IfCallbackRegistered(std::string type, NativeValue* jsListenerObject)
diff --git a/services/src/input_method_system_ability_stub.cpp b/services/src/input_method_system_ability_stub.cpp
index 63e0b5d..029aecb 100644
--- a/services/src/input_method_system_ability_stub.cpp
+++ b/services/src/input_method_system_ability_stub.cpp
@@ -316,6 +316,9 @@ namespace MiscServices {
         int32_t userId = getUserId(uid);
 
         auto *parcel = new (std::nothrow) MessageParcel();
+        if (parcel == nullptr) {
+            return ErrorCode::ERROR_EX_NULL_POINTER;
+        }
         InputMethodProperty *target = InputMethodProperty::Unmarshalling(data);
         parcel->WriteInt32(userId);
         if (!target->Marshalling(*parcel)) {
@@ -326,6 +329,9 @@ namespace MiscServices {
         }
         delete target;
         auto *msg = new (std::nothrow) Message(MSG_ID_SWITCH_INPUT_METHOD, parcel);
+        if (msg == nullptr) {
+            return ErrorCode::ERROR_EX_NULL_POINTER;
+        }
         MessageHandler::Instance()->SendMessage(msg);
         return ErrorCode::NO_ERROR;
     }