diff --git a/entry/src/main/ets/MainAbility/pages/pngjTestCasePage.ets b/entry/src/main/ets/MainAbility/pages/pngjTestCasePage.ets
index 3138976..bd63ad1 100644
--- a/entry/src/main/ets/MainAbility/pages/pngjTestCasePage.ets
+++ b/entry/src/main/ets/MainAbility/pages/pngjTestCasePage.ets
@@ -114,7 +114,7 @@ struct PngjTestCasePage {
           Button('测试readPngImageAsync')
             .onClick(() => {
               let pngj = new Pngj();
-              pngj.readPngImage(this.pngSource, (sender, value) => {
+              pngj.readPngImageAsync(this.pngSource, (sender, value) => {
                 this.pngSource = sender
                 this.hint2 = 'img with=' + value.width + ' img height=' + value.height
                 + ' img depth=' + value.depth + ' img ctype=' + value.ctype
@@ -124,7 +124,7 @@ struct PngjTestCasePage {
           Button('测试writePngWithStringAsync')
             .onClick(() => {
               let pngj = new Pngj();
-              pngj.writePngWithString('hello world', this.pngSource, (sender, value) => {
+              pngj.writePngWithStringAsync('hello world', this.pngSource, (sender, value) => {
                 this.pngSource = sender
                 FileUtils.getInstance().createFileProcess(
                   this.rootFolder + '/pngj',
@@ -137,7 +137,7 @@ struct PngjTestCasePage {
           Button('测试writePngAsync')
             .onClick(() => {
               let pngj = new Pngj();
-              pngj.writePng(this.pngSource, (sender, value) => {
+              pngj.writePngAsync(this.pngSource, (sender, value) => {
                 this.pngSource = sender
                 FileUtils.getInstance().createFileProcess(
                   this.rootFolder + '/pngj',