diff --git a/adapter/uhdf2/hdi/src/idevmgr_client.cpp b/adapter/uhdf2/hdi/src/idevmgr_client.cpp
index 57a07348ebb9d3299c495836f923484d24fe0f8b..a339d72439da5f8fb1797a5612f305d0b1564679 100644
--- a/adapter/uhdf2/hdi/src/idevmgr_client.cpp
+++ b/adapter/uhdf2/hdi/src/idevmgr_client.cpp
@@ -68,6 +68,10 @@ int32_t DeviceManagerProxy::LoadDevice(const std::string &serviceName)
     }
 
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return HDF_ERR_INVALID_PARAM;
+    }
     int status = Remote()->SendRequest(DEVMGR_SERVICE_LOAD_DEVICE, data, reply, option);
     lock.unlock();
     if (status != HDF_SUCCESS) {
@@ -90,6 +94,10 @@ int32_t DeviceManagerProxy::UnloadDevice(const std::string &serviceName)
     }
 
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return HDF_ERR_INVALID_PARAM;
+    }
     int status = Remote()->SendRequest(DEVMGR_SERVICE_UNLOAD_DEVICE, data, reply, option);
     lock.unlock();
     if (status != HDF_SUCCESS) {
@@ -157,6 +165,10 @@ int32_t DeviceManagerProxy::ListAllDevice(std::vector<HdiDevHostInfo> &deviceInf
 
     MessageOption option;
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return HDF_ERR_INVALID_PARAM;
+    }
     int status = Remote()->SendRequest(DEVMGR_SERVICE_LIST_ALL_DEVICE, data, reply, option);
     lock.unlock();
     if (status != HDF_SUCCESS) {
diff --git a/adapter/uhdf2/hdi/src/iservmgr_client.cpp b/adapter/uhdf2/hdi/src/iservmgr_client.cpp
index 66e7d3e278f40d2d34393c77af41d607cba2dfd1..d058a5793e10257b9c1b52faec17127d776c5e60 100644
--- a/adapter/uhdf2/hdi/src/iservmgr_client.cpp
+++ b/adapter/uhdf2/hdi/src/iservmgr_client.cpp
@@ -83,6 +83,10 @@ int32_t ServiceManagerProxy::RegisterServiceStatusListener(
     }
 
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return HDF_ERR_INVALID_PARAM;
+    }
     int status = Remote()->SendRequest(
         static_cast<uint32_t>(HdfDeviceManagerInterfaceCode::DEVSVC_MANAGER_REGISTER_SVCLISTENER), data, reply, option);
     lock.unlock();
@@ -103,6 +107,10 @@ int32_t ServiceManagerProxy::UnregisterServiceStatusListener(::OHOS::sptr<IServS
     }
 
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return HDF_ERR_INVALID_PARAM;
+    }
     int status = Remote()->SendRequest(
         static_cast<uint32_t>(HdfDeviceManagerInterfaceCode::DEVSVC_MANAGER_UNREGISTER_SVCLISTENER), data, reply,
         option);
@@ -123,6 +131,10 @@ sptr<IRemoteObject> ServiceManagerProxy::GetService(const char *serviceName)
 
     MessageOption option;
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return nullptr;
+    }
     int status = Remote()->SendRequest(
         static_cast<uint32_t>(HdfDeviceManagerInterfaceCode::DEVSVC_MANAGER_GET_SERVICE), data, reply, option);
     lock.unlock();
@@ -160,6 +172,10 @@ int32_t ServiceManagerProxy::ListAllService(std::vector<HdiServiceInfo> &service
 
     MessageOption option;
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return HDF_ERR_INVALID_PARAM;
+    }
     int status = Remote()->SendRequest(
         static_cast<uint32_t>(HdfDeviceManagerInterfaceCode::DEVSVC_MANAGER_LIST_ALL_SERVICE), data, reply, option);
     lock.unlock();
@@ -188,6 +204,10 @@ int32_t ServiceManagerProxy::ListServiceByInterfaceDesc(
 
     MessageOption option;
     std::unique_lock<std::mutex> lock(g_remoteMutex);
+    if (Remote() == nullptr) {
+        HDF_LOGE("invalid param Remote()");
+        return HDF_ERR_INVALID_PARAM;
+    }
     int status = Remote()->SendRequest(
         static_cast<uint32_t>(HdfDeviceManagerInterfaceCode::DEVSVC_MANAGER_LIST_SERVICE_BY_INTERFACEDESC), data, reply,
         option);