Update docs (13058)

Signed-off-by: Nester.zhou <ester.zhou@huawei.com>

en/application-dev/reference/apis/js-apis-system-date-time.md

+# @ohos.systemDateTime
+
+The **systemDateTime** module provides system time and time zone features. You can use the APIs of this module to set and obtain the system time and time zone.
+
+> **NOTE**
+>
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+## Modules to Import
+
+```js
+import systemDateTime from '@ohos.systemDateTime';
+```
+
+## systemDateTime.setTime
+
+setTime(time : number, callback : AsyncCallback<void>) : void
+
+Sets the system time. This API uses an asynchronous callback to return the result.
+
+**System API**: This is a system API.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type           | Mandatory| Description                                      |
+| -------- | ----------- | ---- | ---------------- |
+| time     | number                    | Yes  | Timestamp to set, in milliseconds.                        |
+| callback | AsyncCallback<void> | Yes  | Callback used to return the result.|
+
+**Example**
+
+```js
+// Set the system time to 2021-01-20 02:36:25.
+let time = 1611081385000;
+try {
+    systemDateTime.setTime(time, (error) => {
+        if (error) {
+            console.info(`Failed to set time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in setting time`);
+	});
+} catch(e) {
+    console.info(`Failed to set time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.setTime
+
+setTime(time : number) : Promise<void>
+
+Sets the system time. This API uses a promise to return the result.
+
+**System API**: This is a system API.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name| Type  | Mandatory| Description              |
+| ------ | ------ | ---- | ------------------ |
+| time   | number | Yes  | Timestamp to set, in milliseconds.|
+
+**Return value**
+
+| Type               | Description                     |
+| ------------------- | ------------------------- |
+| Promise<void> | Promise that returns no value.|
+
+**Example**
+
+```js
+// Set the system time to 2021-01-20 02:36:25.
+let time = 1611081385000;
+try {
+    systemDateTime.setTime(time).then(() => {
+    	console.info(`Succeeded in setting time.`);
+	}).catch((error) => {
+    	console.info(`Failed to set time. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to set time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getCurrentTime
+
+getCurrentTime(isNano: boolean, callback: AsyncCallback<number>): void
+
+Obtains the time elapsed since the Unix epoch. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type      | Mandatory| Description                            |
+| -------- | -------------- | ---- | ------------------ |
+| isNano   | boolean                     | Yes  | Whether the time to return is in nanoseconds.<br>- **true**: The time to return is in nanoseconds.<br>- **false**: The time to return is in milliseconds.|
+| callback | AsyncCallback&lt;number&gt; | Yes  | Callback used to return the time elapsed since the Unix epoch.        |
+
+**Example**
+
+```js
+try {
+    systemDateTime.getCurrentTime(true, (error, time) => {
+        if (error) {
+            console.info(`Failed to get currentTime. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting currentTime : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get currentTime. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getCurrentTime
+
+getCurrentTime(callback: AsyncCallback&lt;number&gt;): void
+
+Obtains the time elapsed since the Unix epoch. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type              | Mandatory| Description                           |
+| -------- | ----------- | ---- | ---------------------------------- |
+| callback | AsyncCallback&lt;number&gt; | Yes  | Callback used to return the time elapsed since the Unix epoch.        |
+
+**Example**
+
+```js
+try {
+    systemDateTime.getCurrentTime((error, time) => {
+        if (error) {
+            console.info(`Failed to get currentTime. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting currentTime : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get currentTime. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getCurrentTime
+
+getCurrentTime(isNano?: boolean): Promise&lt;number&gt;
+
+Obtains the time elapsed since the Unix epoch. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name| Type   | Mandatory| Description                    |
+| ------ | ------- | ---- | ------------------------- |
+| isNano | boolean | No  | Whether the time to return is in nanoseconds.<br>- **true**: The time to return is in nanoseconds.<br>- **false**: The time to return is in milliseconds.|
+
+**Return value**
+
+| Type       | Description                              |
+| --------------------- | --------------------------- |
+| Promise&lt;number&gt; | Promise used to return the time elapsed since the Unix epoch.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getCurrentTime().then((time) => {
+    	console.info(`Succeeded in getting currentTime : ${time}`);
+	}).catch((error) => {
+    	console.info(`Failed to get currentTime. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get currentTime. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getRealActiveTime
+
+getRealActiveTime(isNano: boolean, callback: AsyncCallback&lt;number&gt;): void
+
+Obtains the time elapsed since system startup, excluding the deep sleep time. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type                       | Mandatory| Description  |
+| -------- | ---------- | ---- | -------------------------- |
+| isNano   | boolean                     | Yes  | Whether the time to return is in nanoseconds.<br>- **true**: The time to return is in nanoseconds.<br>- **false**: The time to return is in milliseconds.|
+| callback | AsyncCallback&lt;number&gt; | Yes  | Callback used to return the time.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getRealActiveTime(true, (error, time) => {
+        if (error) {
+            console.info(`Failed to get real active time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real active time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real active time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getRealActiveTime
+
+getRealActiveTime(callback: AsyncCallback&lt;number&gt;): void
+
+Obtains the time elapsed since system startup, excluding the deep sleep time. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type                       | Mandatory| Description   |
+| -------- | -------------- | ---- | --------------------- |
+| callback | AsyncCallback&lt;number&gt; | Yes  | Callback used to return the time.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getRealActiveTime((error, time) => {
+        if (error) {
+            console.info(`Failed to get real active time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real active time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real active time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getRealActiveTime
+
+getRealActiveTime(isNano?: boolean): Promise&lt;number&gt;
+
+Obtains the time elapsed since system startup, excluding the deep sleep time. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name| Type   | Mandatory| Description                             |
+| ------ | ------- | ---- | ----------------------------------- |
+| isNano | boolean | No  | Whether the time to return is in nanoseconds.<br>- **true**: The time to return is in nanoseconds.<br>- **false**: The time to return is in milliseconds.|
+
+**Return value**
+
+| Type                 | Description        |
+| -------------- | -------------------------------- |
+| Promise&lt;number&gt; | Promise used to return the time elapsed since system startup, excluding the deep sleep time.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getRealActiveTime().then((time) => {
+    	console.info(`Succeeded in getting real active time : ${time}`);
+	}).catch((error) => {
+    	console.info(`Failed to get real active time. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real active time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getRealTime
+
+getRealTime(isNano: boolean, callback: AsyncCallback&lt;number&gt;): void
+
+Obtains the time elapsed since system startup, including the deep sleep time. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type                       | Mandatory| Description  |
+| -------- | --------------- | ---- | ------------------------------- |
+| isNano   | boolean                     | Yes  | Whether the time to return is in nanoseconds.<br>- **true**: The time to return is in nanoseconds.<br>- **false**: The time to return is in milliseconds.|
+| callback | AsyncCallback&lt;number&gt; | Yes  | Callback used to return the time.  |
+
+**Example**
+
+```js
+try {
+    systemDateTime.getRealTime(true, (error, time) => {
+        if (error) {
+            console.info(`Failed to get real time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getRealTime
+
+getRealTime(callback: AsyncCallback&lt;number&gt;): void
+
+Obtains the time elapsed since system startup, including the deep sleep time. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type                       | Mandatory| Description     |
+| -------- | --------- | ---- | --------------------------- |
+| callback | AsyncCallback&lt;number&gt; | Yes  | Callback used to return the time.  |
+
+**Example**
+
+```js
+try {
+    systemDateTime.getRealTime((error, time) => {
+        if (error) {
+            console.info(`Failed to get real time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getRealTime
+
+getRealTime(isNano?: boolean): Promise&lt;number&gt;
+
+Obtains the time elapsed since system startup, including the deep sleep time. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name| Type   | Mandatory| Description                              |
+| ------ | ------- | ---- | ------------------------------- |
+| isNano | boolean | No  | Whether the time to return is in nanoseconds.<br>- **true**: The time to return is in nanoseconds.<br>- **false**: The time to return is in milliseconds.|
+
+**Return value**
+
+| Type                 | Description      |
+| --------------------- | ------------------------------- |
+| Promise&lt;number&gt; | Promise used to return the time elapsed since system startup, including the deep sleep time.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getRealTime().then((time) => {
+    	console.info(`Succeeded in getting real time : ${time}`);
+	}).catch((error) => {
+    	console.info(`Failed to get real time. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real time. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.setDate
+
+setDate(date: Date, callback: AsyncCallback&lt;void&gt;): void
+
+Sets the system date. This API uses an asynchronous callback to return the result.
+
+**System API**: This is a system API.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type                     | Mandatory| Description            |
+| -------- | ------------- | ---- | --------------------- |
+| date     | Date                      | Yes  | Target date to set.                                |
+| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|
+
+**Example**
+
+```js
+let date = new Date();
+try {
+    systemDateTime.setDate(date, (error) => {
+        if (error) {
+            console.info(`Failed to set date. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in setting date.`);
+	});
+} catch(e) {
+    console.info(`Failed to set date. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.setDate
+
+setDate(date: Date): Promise&lt;void&gt;
+
+Sets the system date. This API uses a promise to return the result.
+
+**System API**: This is a system API.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name| Type| Mandatory| Description      |
+| ------ | ---- | ---- | ---------- |
+| date   | Date | Yes  | Target date to set.|
+
+**Return value**
+
+| Type               | Description                |
+| ------------------- | -------------------- |
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Example**
+
+```js
+let date = new Date(); 
+try {
+    systemDateTime.setDate(date).then(() => {
+    	console.info(`Succeeded in setting date.`);
+	}).catch((error) => {
+    	console.info(`Failed to set date. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to set date. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getDate
+
+getDate(callback: AsyncCallback&lt;Date&gt;): void
+
+Obtains the current system date. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type          | Mandatory| Description                  |
+| -------- | -------------- | ---- | --------------------- |
+| callback | AsyncCallback&lt;Date&gt; | Yes  | Callback used to return the current system date.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getDate((error, date) => {
+        if (error) {
+            console.info(`Failed to get date. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting date : ${date}`);;
+	});
+} catch(e) {
+    console.info(`Failed to get date. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getDate
+
+getDate(): Promise&lt;Date&gt;
+
+Obtains the current system date. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Return value**
+
+| Type               | Description                                     |
+| ------------------- | ----------------------------------------- |
+| Promise&lt;Date&gt; | Promise used to return the current system date.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getDate().then((date) => {
+    	console.info(`Succeeded in getting date : ${date}`);
+	}).catch((error) => {
+    	console.info(`Failed to get date. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get date. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.setTimezone
+
+setTimezone(timezone: string, callback: AsyncCallback&lt;void&gt;): void
+
+Sets the system time zone. This API uses an asynchronous callback to return the result.
+
+**System API**: This is a system API.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type             | Mandatory| Description                 |
+| -------- | ------------- | ---- | -------------------------- |
+| timezone | string                    | Yes  | System time zone to set. For details, see [Supported System Time Zones](#supported-system-time-zones).       |
+| callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.setTimezone('Asia/Shanghai', (error) => {
+        if (error) {
+            console.info(`Failed to set timezone. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in setting timezone.`);
+	});
+} catch(e) {
+    console.info(`Failed to set timezone. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.setTimezone
+
+setTimezone(timezone: string): Promise&lt;void&gt;
+
+Sets the system time zone. This API uses a promise to return the result.
+
+**System API**: This is a system API.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type  | Mandatory| Description      |
+| -------- | ------ | ---- | ---------- |
+| timezone | string | Yes  | System time zone to set. For details, see [Supported System Time Zones](#supported-system-time-zones).|
+
+**Return value**
+
+| Type               | Description                |
+| ------------------- | -------------------- |
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Example**
+
+```js
+try {
+    systemDateTime.setTimezone('Asia/Shanghai').then(() => {
+    	console.info(`Succeeded in setting timezone.`);
+	}).catch((error) => {
+    	console.info(`Failed to set timezone. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to set timezone. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getTimezone
+
+getTimezone(callback: AsyncCallback&lt;string&gt;): void
+
+Obtains the system time zone. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Parameters**
+
+| Name  | Type             | Mandatory| Description                |
+| -------- | --------- | ---- | ------------------------ |
+| callback | AsyncCallback&lt;string&gt; | Yes  | Callback used to return the system time zone. For details, see [Supported System Time Zones](#supported-system-time-zones).|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getTimezone((error, data) => {
+        if (error) {
+            console.info(`Failed to get timezone. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in get timezone : ${data}`);;
+	});
+} catch(e) {
+    console.info(`Failed to get timezone. message:${e.message}, code:${e.code}`);
+}
+```
+
+## systemDateTime.getTimezone
+
+getTimezone(): Promise&lt;string&gt;
+
+Obtains the system time zone. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.MiscServices.Time
+
+**Return value**
+
+| Type                 | Description                                 |
+| --------------------- | ------------------------------------- |
+| Promise&lt;string&gt; | Promise used to return the system time zone. For details, see [Supported System Time Zones](#supported-system-time-zones).|
+
+**Example**
+
+```js
+try {
+    systemDateTime.getTimezone().then((data) => {
+    	console.info(`Succeeded in getting timezone: ${data}`);
+	}).catch((error) => {
+    	console.info(`Failed to get timezone. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get timezone. message:${e.message}, code:${e.code}`);
+}
+```
+
+## Supported System Time Zones
+
+The following table lists the supported system time zones and the respective offset (unit: h) between each time zone and time zone 0.
+
+| Time Zone                          | Offset        |
+| ------------------------------ | --------------------- |
+| Antarctica/McMurdo             | 12                    |
+| America/Argentina/Buenos_Aires | -3                    |
+| Australia/Sydney               | 10                    |
+| America/Noronha                | -2                    |
+| America/St_Johns               | -3                    |
+| Africa/Kinshasa                | 1                     |
+| America/Santiago               | -3                    |
+| Asia/Shanghai                  | 8                     |
+| Asia/Nicosia                   | 3                     |
+| Europe/Berlin                  | 2                     |
+| America/Guayaquil              | -5                    |
+| Europe/Madrid                  | 2                     |
+| Pacific/Pohnpei                | 11                    |
+| America/Godthab                | -2                    |
+| Asia/Jakarta                   | 7                     |
+| Pacific/Tarawa                 | 12                    |
+| Asia/Almaty                    | 6                     |
+| Pacific/Majuro                 | 12                    |
+| Asia/Ulaanbaatar               | 8                     |
+| America/Mexico_City            | -5                    |
+| Asia/Kuala_Lumpur              | 8                     |
+| Pacific/Auckland               | 12                    |
+| Pacific/Tahiti                 | -10                   |
+| Pacific/Port_Moresby           | 10                    |
+| Asia/Gaza                      | 3                     |
+| Europe/Lisbon                  | 1                     |
+| Europe/Moscow                  | 3                     |
+| Europe/Kiev                    | 3                     |
+| Pacific/Wake                   | 12                    |
+| America/New_York               | -4                    |
+| Asia/Tashkent                  | 5                     |

en/application-dev/reference/apis/js-apis-system-time.md

-# System Time and Time Zone
+# @ohos.systemTime
 
 The **systemTime** module provides system time and time zone features. You can use the APIs of this module to set and obtain the system time and time zone.
 
@@ -12,7 +12,7 @@ The **systemTime** module provides system time and time zone features. You can u
 import systemTime from '@ohos.systemTime';
 ```
 
-## systemTime.setTime
+## systemTime.setTime<sup>(deprecated)</sup>
 
 setTime(time : number, callback : AsyncCallback&lt;void&gt;) : void
 
@@ -34,16 +34,20 @@ Sets the system time. This API uses an asynchronous callback to return the resul
 ```js
 // Set the system time to 2021-01-20 02:36:25.
 let time = 1611081385000;
-systemTime.setTime(time, (error, data) => {
-    if (error) {
-        console.error(`Failed to set systemTime. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in setting systemTime. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.setTime(time, (error) => {
+        if (error) {
+            console.info(`Failed to setting time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in setting time`);
+	});
+} catch(e) {
+    console.info(`Failed to set time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.setTime
+## systemTime.setTime<sup>(deprecated)</sup>
 
 setTime(time : number) : Promise&lt;void&gt;
 
@@ -70,19 +74,27 @@ Sets the system time. This API uses a promise to return the result.
 ```js
 // Set the system time to 2021-01-20 02:36:25.
 let time = 1611081385000;
-systemTime.setTime(time).then((data) => {
-    console.log(`Succeeded in setting systemTime. Data:` + JSON.stringify(data));
-}).catch((error) => {
-    console.error(`Failed to set systemTime. Cause:` + JSON.stringify(error));
-});
+try {
+    systemTime.setTime(time).then(() => {
+    	console.info(`Succeeded in setting time.`);
+	}).catch((error) => {
+    	console.info(`Failed to setting time. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to set time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getCurrentTime<sup>8+</sup>
+## systemTime.getCurrentTime<sup>(deprecated)</sup>
 
 getCurrentTime(isNano: boolean, callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the time elapsed since the Unix epoch. This API uses an asynchronous callback to return the result.
 
+>  **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getCurrentTime](./js-apis-system-date-time.md#systemdatetimegetcurrenttime).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -95,21 +107,29 @@ Obtains the time elapsed since the Unix epoch. This API uses an asynchronous cal
 **Example**
 
 ```js
-systemTime.getCurrentTime(true, (error, data) => {
-    if (error) {
-        console.error(`Failed to get systemTime. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in getting systemTime. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.getCurrentTime(true, (error, time) => {
+        if (error) {
+            console.info(`Failed to getting currentTime. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting currentTime : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get currentTime. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getCurrentTime<sup>8+</sup>
+## systemTime.getCurrentTime<sup>(deprecated)</sup>
 
 getCurrentTime(callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the time elapsed since the Unix epoch. This API uses an asynchronous callback to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getCurrentTime](./js-apis-system-date-time.md#systemdatetimegetcurrenttime-1).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -121,21 +141,29 @@ Obtains the time elapsed since the Unix epoch. This API uses an asynchronous cal
 **Example**
 
 ```js
-systemTime.getCurrentTime((error, data) => {
-    if (error) {
-        console.error(`Succeeded in getting systemTime. Data:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Failed to get systemTime. Cause:` + JSON.stringify(data));
-});
+try {
+    systemTime.getCurrentTime((error, time) => {
+        if (error) {
+            console.info(`Failed to getting currentTime. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting currentTime : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get currentTime. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getCurrentTime<sup>8+</sup>
+## systemTime.getCurrentTime<sup>(deprecated)</sup>
 
 getCurrentTime(isNano?: boolean): Promise&lt;number&gt;
 
 Obtains the time elapsed since the Unix epoch. This API uses a promise to return the result.
 
+>  **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getCurrentTime](./js-apis-system-date-time.md#systemdatetimegetcurrenttime-2).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -153,19 +181,27 @@ Obtains the time elapsed since the Unix epoch. This API uses a promise to return
 **Example**
 
 ```js
-systemTime.getCurrentTime().then((data) => {
-    console.log(`Succeeded in getting systemTime. Data:` + JSON.stringify(data));
-}).catch((error) => {
-    console.error(`Failed to get systemTime. Cause:` + JSON.stringify(error));
-});
+try {
+    systemTime.getCurrentTime().then((time) => {
+    	console.info(`Succeeded in getting currentTime : ${time}`);
+	}).catch((error) => {
+    	console.info(`Failed to getting currentTime. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get currentTime. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getRealActiveTime<sup>8+</sup>
+## systemTime.getRealActiveTime<sup>(deprecated)</sup>
 
 getRealActiveTime(isNano: boolean, callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the time elapsed since system startup, excluding the deep sleep time. This API uses an asynchronous callback to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getRealActiveTime](./js-apis-system-date-time.md#systemdatetimegetrealactivetime).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -178,21 +214,29 @@ Obtains the time elapsed since system startup, excluding the deep sleep time. Th
 **Example**
 
 ```js
-systemTime.getRealActiveTime(true, (error, data) => {
-    if (error) {
-        console.error(`Failed to get real active time. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in getting real active time. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.getRealActiveTime(true, (error, time) => {
+        if (error) {
+            console.info(`Failed to getting real active time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real active time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real active time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getRealActiveTime<sup>8+</sup>
+## systemTime.getRealActiveTime<sup>(deprecated)</sup>
 
 getRealActiveTime(callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the time elapsed since system startup, excluding the deep sleep time. This API uses an asynchronous callback to return the result.
 
+>  **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getRealActiveTime](./js-apis-system-date-time.md#systemdatetimegetrealactivetime-1).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -204,21 +248,29 @@ Obtains the time elapsed since system startup, excluding the deep sleep time. Th
 **Example**
 
 ```js
-systemTime.getRealActiveTime((error, data) => {
-    if (error) {
-        console.error(`Failed to get real active time. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in getting real active time. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.getRealActiveTime((error, time) => {
+        if (error) {
+            console.info(`Failed to getting real active time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real active time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real active time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getRealActiveTime<sup>8+</sup>
+## systemTime.getRealActiveTime<sup>(deprecated)</sup>
 
 getRealActiveTime(isNano?: boolean): Promise&lt;number&gt;
 
 Obtains the time elapsed since system startup, excluding the deep sleep time. This API uses a promise to return the result.
 
+>  **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getRealActiveTime](./js-apis-system-date-time.md#systemdatetimegetrealactivetime-2).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -236,19 +288,27 @@ Obtains the time elapsed since system startup, excluding the deep sleep time. Th
 **Example**
 
 ```js
-systemTime.getRealActiveTime().then((data) => {
-    console.log(`Succeeded in getting real active time. Data:` + JSON.stringify(data));
-}).catch((error) => {
-    console.error(`Failed to get real active time. Cause:` + JSON.stringify(error));
-});
+try {
+    systemTime.getRealActiveTime().then((time) => {
+    	console.info(`Succeeded in getting real active time : ${time}`);
+	}).catch((error) => {
+    	console.info(`Failed to getting real active time. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real active time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getRealTime<sup>8+</sup>
+## systemTime.getRealTime<sup>(deprecated)</sup>
 
 getRealTime(isNano: boolean, callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the time elapsed since system startup, including the deep sleep time. This API uses an asynchronous callback to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getRealTime](./js-apis-system-date-time.md#systemdatetimegetrealtime).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -261,21 +321,29 @@ Obtains the time elapsed since system startup, including the deep sleep time. Th
 **Example**
 
 ```js
-systemTime.getRealTime(true, (error, data) => {
-    if (error) {
-        console.error(`Failed to get real time. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in getting real time. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.getRealTime(true, (error, time) => {
+        if (error) {
+            console.info(`Failed to getting real time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getRealTime<sup>8+</sup>
+## systemTime.getRealTime<sup>(deprecated)</sup>
 
 getRealTime(callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the time elapsed since system startup, including the deep sleep time. This API uses an asynchronous callback to return the result.
 
+>  **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getRealTime](./js-apis-system-date-time.md#systemdatetimegetrealtime-1).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -287,28 +355,36 @@ Obtains the time elapsed since system startup, including the deep sleep time. Th
 **Example**
 
 ```js
-systemTime.getRealTime((error, data) => {
-    if (error) {
-        console.error(`Failed to get real time. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in getting real time. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.getRealTime((error, time) => {
+        if (error) {
+            console.info(`Failed to getting real time. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in getting real time : ${time}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getRealTime<sup>8+</sup>
+## systemTime.getRealTime<sup>(deprecated)</sup>
 
 getRealTime(isNano?: boolean): Promise&lt;number&gt;
 
 Obtains the time elapsed since system startup, including the deep sleep time. This API uses a promise to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getRealTime](./js-apis-system-date-time.md#systemdatetimegetrealtime-2).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
 
 | Name| Type   | Mandatory| Description                              |
 | ------ | ------- | ---- | ------------------------------- |
-| isNano | boolean | No  | Whether the time to return is in nanoseconds.<<br>- **true**: in nanoseconds (ns).<br>- **false**: in milliseconds (ms).|
+| isNano | boolean | No  | Whether the time to return is in nanoseconds.<br>- **true**: in nanoseconds (ns).<br>- **false**: in milliseconds (ms).|
 
 **Return value**
 
@@ -319,14 +395,18 @@ Obtains the time elapsed since system startup, including the deep sleep time. Th
 **Example**
 
 ```js
-systemTime.getRealTime().then((data) => {
-    console.log(`Succeeded in getting real time. Data:` + JSON.stringify(data));
-}).catch((error) => {
-    console.error(`Failed to get real time. Cause:` + JSON.stringify(error));
-});
+try {
+    systemTime.getRealTime().then((time) => {
+    	console.info(`Succeeded in getting real time : ${time}`);
+	}).catch((error) => {
+    	console.info(`Failed to getting real time. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get real time. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.setDate
+## systemTime.setDate<sup>(deprecated)</sup>
 
 setDate(date: Date, callback: AsyncCallback&lt;void&gt;): void
 
@@ -346,17 +426,21 @@ Sets the system date. This API uses an asynchronous callback to return the resul
 **Example**
 
 ```js
-let data = new Date();
-systemTime.setDate(data,(error, data) => {       
-    if (error) {            
-    console.error('Failed to set system date. Cause:' + JSON.stringify(error));           
-    return;       
-}        
-    console.info('Succeeded in setting system date. Data:' + JSON.stringify(data));    
-});
+let date = new Date();
+try {
+    systemTime.setDate(date, (error) => {
+        if (error) {
+            console.info(`Failed to setting date. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in setting date.`);
+	});
+} catch(e) {
+    console.info(`Failed to set date. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.setDate
+## systemTime.setDate<sup>(deprecated)</sup>
 
 setDate(date: Date): Promise&lt;void&gt;
 
@@ -381,20 +465,28 @@ Sets the system date. This API uses a promise to return the result.
 **Example**
 
 ```js
-let data = new Date(); 
-systemTime.setDate(data).then((value) => {        
-    console.log(`Succeeded in setting system date. Data:` + JSON.stringify(value));    
-}).catch((error) => {        
-    console.error(`Failed to set system date. Cause:` + JSON.stringify(error));
-});
+let date = new Date(); 
+try {
+    systemTime.setDate(date).then(() => {
+    	console.info(`Succeeded in setting date.`);
+	}).catch((error) => {
+    	console.info(`Failed to setting date. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to set date. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getDate<sup>8+</sup>
+## systemTime.getDate<sup>(deprecated)</sup>
 
 getDate(callback: AsyncCallback&lt;Date&gt;): void
 
 Obtains the current system date. This API uses an asynchronous callback to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getDate](./js-apis-system-date-time.md#systemdatetimegetdate).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -406,21 +498,29 @@ Obtains the current system date. This API uses an asynchronous callback to retur
 **Example**
 
 ```js
-systemTime.getDate((error, data) => {
-    if (error) {
-        console.error(`Failed to get system date. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in getting system date. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.getDate((error, date) => {
+        if (error) {
+            console.info(`Failed to get date. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in get date : ${date}`);;
+	});
+} catch(e) {
+    console.info(`Failed to get date. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getDate<sup>8+</sup>
+## systemTime.getDate<sup>(deprecated)</sup>
 
 getDate(): Promise&lt;Date&gt;
 
 Obtains the current system date. This API uses a promise to return the result.  
 
+>  **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getDate](./js-apis-system-date-time.md#systemdatetimegetdate-1).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Return value**
@@ -432,14 +532,18 @@ Obtains the current system date. This API uses a promise to return the result.
 **Example**
 
 ```js
-systemTime.getDate().then((data) => {
-    console.log(`Succeeded in getting system date. Data:` + JSON.stringify(data));
-}).catch((error) => {
-    console.error(`Failed to get system date. Cause:` + JSON.stringify(error));
-});
+try {
+    systemTime.getDate().then((date) => {
+    	console.info(`Succeeded in getting date : ${date}`);
+	}).catch((error) => {
+    	console.info(`Failed to getting date. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get date. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.setTimezone
+## systemTime.setTimezone<sup>(deprecated)</sup>
 
 setTimezone(timezone: string, callback: AsyncCallback&lt;void&gt;): void
 
@@ -459,16 +563,20 @@ Sets the system time zone. This API uses an asynchronous callback to return the
 **Example**
 
 ```js
-systemTime.setTimezone('Asia/Shanghai', (error, data) => {       
-    if (error) {          
-        console.error('Failed to set system time zone. Cause:' + JSON.stringify(error));         
-        return;       
-    }       
-    console.info('Succeeded in setting system time zone. Data:' + JSON.stringify(data)); 
-});
+try {
+    systemTime.setTimezone('Asia/Shanghai', (error) => {
+        if (error) {
+            console.info(`Failed to setting timezone. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in setting timezone.`);
+	});
+} catch(e) {
+    console.info(`Failed to set timezone. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.setTimezone
+## systemTime.setTimezone<sup>(deprecated)</sup>
 
 setTimezone(timezone: string): Promise&lt;void&gt;
 
@@ -493,19 +601,27 @@ Sets the system time zone. This API uses a promise to return the result.
 **Example**
 
 ```js
-systemTime.setTimezone('Asia/Shanghai').then((data) => {        
-    console.log(`Succeeded in setting system time zone. Data:` + JSON.stringify(data));     
-}).catch((error) => {        
-    console.error(`Failed to set system time zone. Cause:` + JSON.stringify(error));    
-});
+try {
+    systemTime.setTimezone('Asia/Shanghai').then(() => {
+    	console.info(`Succeeded in setting timezone.`);
+	}).catch((error) => {
+    	console.info(`Failed to setting timezone. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to set timezone. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getTimezone<sup>8+</sup>
+## systemTime.getTimezone<sup>(deprecated)</sup>
 
 getTimezone(callback: AsyncCallback&lt;string&gt;): void
 
 Obtains the system time zone. This API uses an asynchronous callback to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getTimezone](./js-apis-system-date-time.md#systemdatetimegettimezone).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -517,21 +633,29 @@ Obtains the system time zone. This API uses an asynchronous callback to return t
 **Example**
 
 ```js
-systemTime.getTimezone((error, data) => {
-    if (error) {
-        console.error(`Failed to get system time zone. Cause:` + JSON.stringify(error));
-        return;
-    }
-    console.log(`Succeeded in getting system time zone. Data:` + JSON.stringify(data));
-});
+try {
+    systemTime.getTimezone((error, data) => {
+        if (error) {
+            console.info(`Failed to get timezone. message:${error.message}, code:${error.code}`);
+            return;
+        }
+    	console.info(`Succeeded in get timezone : ${data}`);;
+	});
+} catch(e) {
+    console.info(`Failed to get timezone. message:${e.message}, code:${e.code}`);
+}
 ```
 
-## systemTime.getTimezone<sup>8+</sup>
+## systemTime.getTimezone<sup>(deprecated)</sup>
 
 getTimezone(): Promise&lt;string&gt;
 
 Obtains the system time zone. This API uses a promise to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [systemDateTime.getTimezone](./js-apis-system-date-time.md#systemdatetimegettimezone-1).
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Return value**
@@ -543,11 +667,15 @@ Obtains the system time zone. This API uses a promise to return the result.
 **Example**
 
 ```js
-systemTime.getTimezone().then((data) => {
-    console.log(`Succeeded in getting system time zone. Data:` + JSON.stringify(data));
-}).catch((error) => {
-    console.error(`Failed to get system time zone. Cause:` + JSON.stringify(error));
-});
+try {
+    systemTime.getTimezone().then((data) => {
+    	console.info(`Succeeded in getting timezone: ${data}`);
+	}).catch((error) => {
+    	console.info(`Failed to getting timezone. message:${error.message}, code:${error.code}`);
+	});
+} catch(e) {
+    console.info(`Failed to get timezone. message:${e.message}, code:${e.code}`);
+}
 ```
 
 ## Supported System Time Zones

en/application-dev/reference/apis/js-apis-system-timer.md

-# System Timer
+# @ohos.systemTimer
 
 The **systemTimer** module provides system timer features. You can use the APIs of this module to implement the alarm clock and other timer services.
 
@@ -33,13 +33,13 @@ Defines the initialization options for **createTimer**.
 
 **System capability**: SystemCapability.MiscServices.Time
 
-| Name     | Type                             | Mandatory| Description                                                        |
-| --------- | --------------------------------- | ---- | ------------------------------------------------------------ |
-| type      | number                            | Yes  | Timer type.<br>**1**: CPU time type. The start time of the timer cannot be later than the current system time.<br>**2**: wakeup type.<br>**4**: exact type.<br>**5**: idle type (not supported currently).|
-| repeat    | boolean                           | Yes  | Whether the timer is a repeating timer. The value **true** means that the timer is a repeating timer, and **false** means that the timer is a one-shot timer.                       |
-| interval  | number                            | No  | Repeat interval. For a repeating timer, the value must be greater than 5000 ms. For a one-shot timer, the value is **0**.|
-| wantAgent | [WantAgent](js-apis-wantAgent.md) | No  | **WantAgent** object of the notification to be sent when the timer expires. (An application MainAbility can be started, but not a Service ability.)|
-| callback  | number                            | Yes  | Callback used to return the timer ID.                            |
+| Name     | Type                                         | Mandatory| Description                                                        |
+| --------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
+| type      | number                                        | Yes  | Timer type.<br>**1**: CPU time type. (The start time of the timer cannot be later than the current system time.)<br>**2**: wakeup type.<br>**4**: exact type.<br>**8**: idle type (not supported currently).|
+| repeat    | boolean                                       | Yes  | Whether the timer is a repeating timer. The value **true** means that the timer is a repeating timer, and **false** means that the timer is a one-shot timer.                       |
+| interval  | number                                        | No  | Repeat interval. For a repeating timer, the value must be greater than 5000 ms. For a one-shot timer, the value is **0**.|
+| wantAgent | [WantAgent](js-apis-app-ability-wantAgent.md) | No  | **WantAgent** object of the notification to be sent when the timer expires. (An application MainAbility can be started, but not a Service ability.)|
+| callback  | number                                        | Yes  | Callback used to return the timer ID.                            |
 
 
 ## systemTimer.createTimer
@@ -48,6 +48,8 @@ createTimer(options: TimerOptions, callback: AsyncCallback&lt;number&gt;): void
 
 Creates a timer. This API uses an asynchronous callback to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -66,13 +68,17 @@ export default {
             type: systemTimer.TIMER_TYPE_REALTIME,
             repeat: false
         };
-        systemTimer.createTimer(options, (error, data) => {
-            if (error) {
-                console.error(`Failed to create timer. Cause:` + JSON.stringify(error));
-                return;
-            }
-            console.log(`Succeeded in creating timer. Data:` + JSON.stringify(data));
-        });
+        try {
+            systemTimer.createTimer(options, (error) => {
+                if (error) {
+                    console.info(`Failed to create timer. message:${error.message}, code:${error.code}`);
+                    return;
+                }
+           		console.info(`Succeeded in creating timer.`);
+        	});
+        } catch(e) {
+            console.info(`Failed to create timer. message:${e.message}, code:${e.code}`);
+        }
     }
 }
 ```
@@ -83,6 +89,8 @@ createTimer(options: TimerOptions): Promise&lt;number&gt;
 
 Creates a timer. This API uses a promise to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -105,12 +113,16 @@ export default {
         let options = {
             type: systemTimer.TIMER_TYPE_REALTIME,
             repeat:false
-        };
-        systemTimer.createTimer(options).then((data) => {
-            console.log(`Succeeded in creating timer. Data:` + JSON.stringify(data));
-        }).catch((error) => {
-            console.error(`Failed to create timer. Cause:` + JSON.stringify(error));
-        });
+        };     
+        try {
+    		systemTimer.createTimer(options).then(() => {
+    			console.info(`Succeeded in creating timer.`);
+			}).catch((error) => {
+    			console.info(`Failed to create timer. message:${error.message}, code:${error.code}`);
+			});
+        } catch(e) {
+            console.info(`Failed to create timer. message:${e.message}, code:${e.code}`);
+        }
     }
 }
 ```
@@ -121,6 +133,8 @@ startTimer(timer: number, triggerTime: number, callback: AsyncCallback&lt;void&g
 
 Starts a timer. This API uses an asynchronous callback to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -143,12 +157,17 @@ export default {
       let timerId = await systemTimer.createTimer(options)
       let triggerTime = new Date().getTime()
       triggerTime += 3000
-      systemTimer.startTimer(timerId, triggerTime, (error) => {
-          if (error) {
-              console.error(`Failed to start timer. Cause:` + JSON.stringify(error));
-              return;
-          }
-      });
+      try {
+          systemTimer.startTimer(timerId, triggerTime, (error) => {
+              if (error) {
+                  console.info(`Failed to start timer. message:${error.message}, code:${error.code}`);
+                  return;
+              }
+              console.info(`Succeeded in starting timer.`);
+          });
+      } catch(e) {
+          console.info(`Failed to start timer. message:${e.message}, code:${e.code}`);
+      }
     }
 }
 ```
@@ -159,6 +178,8 @@ startTimer(timer: number, triggerTime: number): Promise&lt;void&gt;
 
 Starts a timer. This API uses a promise to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -186,11 +207,15 @@ export default {
         let timerId = await systemTimer.createTimer(options)
         let triggerTime = new Date().getTime()
         triggerTime += 3000
-        systemTimer.startTimer(timerId, triggerTime).then((data) => {
-            console.log(`Succeeded in startting timer. Data:` + JSON.stringify(data));
-        }).catch((error) => {
-            console.error(`Failed to start timer. Cause:` + JSON.stringify(error));
-        });
+        try {
+            systemTimer.startTimer(timerId, triggerTime).then(() => {
+            	console.info(`Succeeded in starting timer.`);
+       		}).catch((error) => {
+            	console.info(`Failed to start timer. message:${error.message}, code:${error.code}`);
+        	});
+        } catch(e) {
+            console.info(`Failed to start timer. message:${e.message}, code:${e.code}`);
+        } 
     }
 }
 ```
@@ -201,6 +226,8 @@ stopTimer(timer: number, callback: AsyncCallback&lt;void&gt;): void
 
 Stops a timer. This API uses an asynchronous callback to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -214,22 +241,27 @@ Stops a timer. This API uses an asynchronous callback to return the result.
 
 ```js
 export default {
-  async systemTimer () {
-      let options = {
-          type: systemTimer.TIMER_TYPE_REALTIME,
-          repeat:false
-      }
-      let timerId = await systemTimer.createTimer(options)
-      let triggerTime = new Date().getTime()
-      triggerTime += 3000
-      systemTimer.startTimer(timerId, triggerTime)
-      systemTimer.stopTimer(timerId, (error) => {
-          if (error) {
-              console.error(`Failed to stop timer. Cause:` + JSON.stringify(error));
-              return;
-          }
-      });
-  }
+    async systemTimer () {
+        let options = {
+            type: systemTimer.TIMER_TYPE_REALTIME,
+            repeat:false
+        }
+        let timerId = await systemTimer.createTimer(options)
+        let triggerTime = new Date().getTime()
+        triggerTime += 3000
+        systemTimer.startTimer(timerId, triggerTime)
+        try {
+            systemTimer.stopTimer(timerId, (error) => {
+                if (error) {
+                    console.info(`Failed to stop timer. message:${error.message}, code:${error.code}`);
+                    return;
+                }
+                console.info(`Succeeded in stopping timer.`);
+            });
+        } catch(e) {
+            console.info(`Failed to stop timer. message:${e.message}, code:${e.code}`);
+        }
+	}
 }
 ```
 
@@ -239,6 +271,8 @@ stopTimer(timer: number): Promise&lt;void&gt;
 
 Stops a timer. This API uses a promise to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -257,21 +291,25 @@ Stops a timer. This API uses a promise to return the result.
 
 ```js
 export default {
-  async systemTimer (){
-      let options = {
-          type: systemTimer.TIMER_TYPE_REALTIME,
-          repeat:false
-      }
-      let timerId = await systemTimer.createTimer(options)
-  	  let triggerTime = new Date().getTime()
-      triggerTime += 3000
-      systemTimer.startTimer(timerId, triggerTime)
-      systemTimer.stopTimer(timerId).then((data) => {
-          console.log(`Succeeded in stopping timer. Data:` + JSON.stringify(data));
-      }).catch((error) => {
-          console.error(`Failed to stop timer. Cause:` + JSON.stringify(error));
-      });
-  }
+    async systemTimer (){
+        let options = {
+            type: systemTimer.TIMER_TYPE_REALTIME,
+            repeat:false
+        }
+        let timerId = await systemTimer.createTimer(options)
+        let triggerTime = new Date().getTime()
+        triggerTime += 3000
+        systemTimer.startTimer(timerId, triggerTime)
+        try {
+            systemTimer.stopTimer(timerId).then(() => {
+                console.info(`Succeeded in stopping timer.`);
+            }).catch((error) => {
+                console.info(`Failed to stop timer. message:${error.message}, code:${error.code}`);
+            });
+        } catch(e) {
+            console.info(`Failed to stop timer. message:${e.message}, code:${e.code}`);
+        }
+    }
 }
 ```
 
@@ -281,6 +319,8 @@ destroyTimer(timer: number, callback: AsyncCallback&lt;void&gt;): void
 
 Destroys a timer. This API uses an asynchronous callback to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -304,12 +344,17 @@ export default {
         triggerTime += 3000
         systemTimer.startTimer(timerId, triggerTime)
         systemTimer.stopTimer(timerId)
-        systemTimer.destroyTimer(timerId, (error) => {
-            if (error) {
-                console.error(`Failed to destroy timer. Cause:` + JSON.stringify(error));
-                return;
-            }
-        });
+        try {
+            systemTimer.destroyTimer(timerId, (error) => {
+                if (error) {
+                    console.info(`Failed to destroy timer. message:${error.message}, code:${error.code}`);
+                    return;
+                }
+                console.info(`Succeeded in destroying timer.`);
+        	});
+        } catch(e) {
+            console.info(`Failed to destroying timer. message:${e.message}, code:${e.code}`);
+        }
     }
 }
 ```
@@ -320,6 +365,8 @@ destroyTimer(timer: number): Promise&lt;void&gt;
 
 Destroys a timer. This API uses a promise to return the result.
 
+**System API**: This is a system API.
+
 **System capability**: SystemCapability.MiscServices.Time
 
 **Parameters**
@@ -348,11 +395,15 @@ export default {
         triggerTime += 3000
         systemTimer.startTimer(timerId, triggerTime)
         systemTimer.stopTimer(timerId)
-        systemTimer.destroyTimer(timerId).then((data) => {
-            console.log(`Succeeded in destroying timer. Data:` + JSON.stringify(data));
-        }).catch((error) => {
-            console.error(`Failed to destroy timer. Cause:` + JSON.stringify(error));
-        });
+        try {
+            systemTimer.destroyTimer(timerId).then(() => {
+            	 console.info(`Succeeded in destroying timer.`);
+            }).catch((error) => {
+                console.info(`Failed to destroy timer. message:${error.message}, code:${error.code}`);
+            });
+        } catch(e) {
+            console.info(`Failed to destroying timer. message:${e.message}, code:${e.code}`);
+        }
     }
 }
 ```