diff --git a/runtime/main/extend/systemplugin/napi/ohos_systemTimer.js b/runtime/main/extend/systemplugin/napi/ohos_systemTimer.js
index ce16e5a0..0eeefe7b 100644
--- a/runtime/main/extend/systemplugin/napi/ohos_systemTimer.js
+++ b/runtime/main/extend/systemplugin/napi/ohos_systemTimer.js
@@ -1,74 +1,82 @@
-/*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import { paramMock } from "../utils"
-
-export function mockSystemTimer() {
-  const systemTimer = {
-    TIMER_TYPE_REALTIME: '[PC preview] unknow TIMER_TYPE_REALTIME',
-    TIMER_TYPE_WAKEUP: '[PC preview] unknow TIMER_TYPE_WAKEUP',
-    TIMER_TYPE_EXACT: '[PC preview] unknow TIMER_TYPE_EXACT',
-    TIMER_TYPE_IDLE: '[PC preview] unknow TIMER_TYPE_IDLE',
-    createTimer: function (...args) {
-      console.warn("systemTimer.createTimer interface mocked in the Previewer. How this interface works on the" +
-        " Previewer may be different from that on a real device.")
-      const len = args.length
-      if (typeof args[len - 1] === 'function') {
-        args[len - 1].call(this, paramMock.businessErrorMock, paramMock.paramNumberMock)
-      } else {
-        return new Promise((resolve, reject) => {
-          resolve(paramMock.paramNumberMock);
-        })
-      }
-    },
-    startTimer: function (...args) {
-      console.warn("systemTimer.startTimer interface mocked in the Previewer. How this interface works on the" +
-        " Previewer may be different from that on a real device.")
-      const len = args.length
-      if (typeof args[len - 1] === 'function') {
-        args[len - 1].call(this, paramMock.businessErrorMock)
-      } else {
-        return new Promise((resolve, reject) => {
-          resolve();
-        })
-      }
-    },
-    stopTimer: function (...args) {
-      console.warn("systemTimer.stopTimer interface mocked in the Previewer. How this interface works on the" +
-        " Previewer may be different from that on a real device.")
-      const len = args.length
-      if (typeof args[len - 1] === 'function') {
-        args[len - 1].call(this, paramMock.businessErrorMock)
-      } else {
-        return new Promise((resolve, reject) => {
-          resolve();
-        })
-      }
-    },
-    destroyTimer: function (...args) {
-      console.warn("systemTimer.destroyTimer interface mocked in the Previewer. How this interface works on the" +
-        " Previewer may be different from that on a real device.")
-      const len = args.length
-      if (typeof args[len - 1] === 'function') {
-        args[len - 1].call(this, paramMock.businessErrorMock)
-      } else {
-        return new Promise((resolve, reject) => {
-          resolve();
-        })
-      }
-    }
-  }
-  return systemTimer
-}
\ No newline at end of file
+/*
+ * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { paramMock } from "../utils"
+import { WantAgent } from "./ohos_wantAgent"
+
+export function mockSystemTimer() {
+  const systemTimer = {
+    TIMER_TYPE_REALTIME: '[PC preview] unknow TIMER_TYPE_REALTIME',
+    TIMER_TYPE_WAKEUP: '[PC preview] unknow TIMER_TYPE_WAKEUP',
+    TIMER_TYPE_EXACT: '[PC preview] unknow TIMER_TYPE_EXACT',
+    TIMER_TYPE_IDLE: '[PC preview] unknow TIMER_TYPE_IDLE',
+    createTimer: function (...args) {
+      console.warn("systemTimer.createTimer interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock, paramMock.paramNumberMock)
+      } else {
+        return new Promise((resolve, reject) => {
+          resolve(paramMock.paramNumberMock);
+        })
+      }
+    },
+    startTimer: function (...args) {
+      console.warn("systemTimer.startTimer interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock)
+      } else {
+        return new Promise((resolve, reject) => {
+          resolve();
+        })
+      }
+    },
+    stopTimer: function (...args) {
+      console.warn("systemTimer.stopTimer interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock)
+      } else {
+        return new Promise((resolve, reject) => {
+          resolve();
+        })
+      }
+    },
+    destroyTimer: function (...args) {
+      console.warn("systemTimer.destroyTimer interface mocked in the Previewer. How this interface works on the" +
+        " Previewer may be different from that on a real device.")
+      const len = args.length
+      if (typeof args[len - 1] === 'function') {
+        args[len - 1].call(this, paramMock.businessErrorMock)
+      } else {
+        return new Promise((resolve, reject) => {
+          resolve();
+        })
+      }
+    }
+  }
+  const TimerOptions = {
+    type: '[PC Preview] unknown type',
+    repeat: '[PC Preview] unknown repeat',
+    interval: '[PC Preview] unknown interval',
+    wantAgent: WantAgent,
+    callback:'[PC Preview] unknown interval'
+  }
+  return systemTimer
+}