diff --git a/zh-cn/application-dev/reference/apis/js-apis-system-parameter.md b/zh-cn/application-dev/reference/apis/js-apis-system-parameter.md
index c85b447f4b4f38ca40d39b7c290654816e2af2d3..43cefdea82f00f941d1f57e12bca63ce516cb7ef 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-system-parameter.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-system-parameter.md
@@ -69,7 +69,7 @@ get(key: string, callback: AsyncCallback<string>): void
 import { BusinessError } from '@ohos.base';
 
 try {
-    systemparameter.get("const.ohos.apiversion", (err:BusinessError, data:string) => {
+    systemparameter.get("const.ohos.apiversion", (err: BusinessError, data: string) => {
     if (err == undefined) {
         console.log("get test.parameter.key value success:" + data)
     } else {
@@ -102,7 +102,7 @@ get(key: string, def: string, callback: AsyncCallback<string>): void
 import { BusinessError } from '@ohos.base';
 
 try {
-    systemparameter.get("const.ohos.apiversion", "default", (err:BusinessError, data:string) => {
+    systemparameter.get("const.ohos.apiversion", "default", (err: BusinessError, data: string) => {
         if (err == undefined) {
             console.log("get test.parameter.key value success:" + data)
         } else {
@@ -142,9 +142,9 @@ import { BusinessError } from '@ohos.base';
 
 try {
     let p = systemparameter.get("const.ohos.apiversion");
-    p.then((value:string) => {
+    p.then((value: string) => {
         console.log("get test.parameter.key success: " + value);
-    }).catch((err:BusinessError) => {
+    }).catch((err: BusinessError) => {
         console.log("get test.parameter.key error: " + err.code);
     });
 } catch(e) {
@@ -208,7 +208,7 @@ set(key: string, value: string, callback: AsyncCallback<void>): void
 import { BusinessError } from '@ohos.base';
 
 try {
-    systemparameter.set("test.parameter.key", "testValue",  (err:BusinessError, data:string) =>{
+    systemparameter.set("test.parameter.key", "testValue",  (err: BusinessError, data: void) =>{
     if (err == undefined) {
         console.log("set test.parameter.key value success :" + data)
     } else {
@@ -251,9 +251,9 @@ import { BusinessError } from '@ohos.base';
 
 try {
     let p = systemparameter.set("test.parameter.key", "testValue");
-    p.then((value:string) => {
+    p.then((value: void) => {
         console.log("set test.parameter.key success: " + value);
-    }).catch((err:BusinessError) => {
+    }).catch((err: BusinessError) => {
         console.log(" set test.parameter.key error: " + err.code);
     });
 } catch(e) {
diff --git a/zh-cn/application-dev/reference/apis/js-apis-system-parameterEnhance.md b/zh-cn/application-dev/reference/apis/js-apis-system-parameterEnhance.md
index 9ee0568cccc3d95b42867ebfbc880744638b2743..6a26247644f0768fdd8d589e2921f8907c399118 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-system-parameterEnhance.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-system-parameterEnhance.md
@@ -69,7 +69,7 @@ get(key: string, callback: AsyncCallback<string>): void
 import { BusinessError } from '@ohos.base';
 
 try {
-    systemparameter.get("const.ohos.apiversion", (err:BusinessError, data:string) => {
+    systemparameter.get("const.ohos.apiversion", (err: BusinessError, data: string) => {
     if (err == undefined) {
         console.log("get test.parameter.key value success:" + data)
     } else {
@@ -102,7 +102,7 @@ get(key: string, def: string, callback: AsyncCallback<string>): void
 import { BusinessError } from '@ohos.base';
 
 try {
-    systemparameter.get("const.ohos.apiversion", "default", (err:BusinessError, data:string) => {
+    systemparameter.get("const.ohos.apiversion", "default", (err: BusinessError, data: string) => {
         if (err == undefined) {
             console.log("get test.parameter.key value success:" + data)
         } else {
@@ -142,9 +142,9 @@ import { BusinessError } from '@ohos.base';
 
 try {
     let p = systemparameter.get("const.ohos.apiversion");
-    p.then((value:string) => {
+    p.then((value: string) => {
         console.log("get test.parameter.key success: " + value);
-    }).catch((err:BusinessError) => {
+    }).catch((err: BusinessError) => {
         console.log("get test.parameter.key error: " + err.code);
     });
 } catch(e) {
@@ -201,7 +201,7 @@ set(key: string, value: string, callback: AsyncCallback<void>): void
 import { BusinessError } from '@ohos.base';
 
 try {
-    systemparameter.set("test.parameter.key", "testValue", (err:BusinessError, data:string) => {
+    systemparameter.set("test.parameter.key", "testValue", (err: BusinessError, data: void) => {
     if (err == undefined) {
         console.log("set test.parameter.key value success :" + data)
     } else {
@@ -240,9 +240,9 @@ import { BusinessError } from '@ohos.base';
 
 try {
     let p = systemparameter.set("test.parameter.key", "testValue");
-    p.then((value:string) => {
+    p.then((value: void) => {
         console.log("set test.parameter.key success: " + value);
-    }).catch((err:BusinessError) => {
+    }).catch((err: BusinessError) => {
         console.log(" set test.parameter.key error: " + err.code);
     });
 } catch(e) {