diff --git a/widgets/ukui-task-manager/qml/ThumbnailContainer.qml b/widgets/ukui-task-manager/qml/ThumbnailContainer.qml
index a05222f6822041e13f086122e06967443ca55400..8c1499326f72c1c7d4fc7920ea55a2e5fa1ee72e 100644
--- a/widgets/ukui-task-manager/qml/ThumbnailContainer.qml
+++ b/widgets/ukui-task-manager/qml/ThumbnailContainer.qml
@@ -121,6 +121,9 @@ DtThemeBackground {
                     visible: container.containsMouse
 
                     DtThemeBackground {
+                        Accessible.role: Accessible.Button
+                        Accessible.description: "This is a close button of ukui-panel thumbnail window"
+                        Accessible.name: ukui-panel_thumbnail_window_close_button
                         backgroundColor: closeButtonArea.containsPress ? GlobalTheme.kErrorClick :
                                                                          GlobalTheme.kErrorNormal
                         radius: GlobalTheme.kRadiusNormal
@@ -215,6 +218,9 @@ DtThemeBackground {
                     visible: container.containsMouse
 
                     DtThemeBackground {
+                        Accessible.role: Accessible.Button
+                        Accessible.description: "This is a close button of ukui-panel thumbnail window"
+                        Accessible.name: ukui-panel_thumbnail_window_close_button
                         backgroundColor: listCloseButtonArea.containsPress ? GlobalTheme.kErrorClick :
                                                                              GlobalTheme.kErrorNormal
                         radius: GlobalTheme.kRadiusMin
diff --git a/widgets/ukui-task-manager/qml/ThumbnailWindow.qml b/widgets/ukui-task-manager/qml/ThumbnailWindow.qml
index 1c522503abdcaffbb244ad0804cf7f69f0f17187..3eef6a31383f0bed178028a24d36044ccf5ea4d1 100644
--- a/widgets/ukui-task-manager/qml/ThumbnailWindow.qml
+++ b/widgets/ukui-task-manager/qml/ThumbnailWindow.qml
@@ -535,6 +535,9 @@ MouseArea {
                             visible: mouseAreaContainsMouse
 
                             DtThemeBackground {
+                                Accessible.role: Accessible.Button
+                                Accessible.description: "This is a close button of ukui-panel thumbnail window"
+                                Accessible.name: ukui-panel_thumbnail_window_close_button
                                 backgroundColor: closeButtonArea.containsPress ? Platform.GlobalTheme.kErrorClick :
                                                                                  Platform.GlobalTheme.kErrorNormal
                                 radius: Platform.GlobalTheme.kRadiusMin