diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Events/Service/ChangeAppAdminEvent.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Events/Service/ChangeAppAdminEvent.cs
new file mode 100644
index 00000000..bca373fa
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Events/Service/ChangeAppAdminEvent.cs
@@ -0,0 +1,15 @@
+namespace SKIT.FlurlHttpClient.Wechat.Work.Events
+{
+    /// <summary>
+    /// <para>表示 EVENT.change_app_admin 事件的数据。</para>
+    /// <para>REF: https://open.work.weixin.qq.com/api/doc/90001/90143/95038 </para>
+    /// </summary>
+    public class ChangeAppAdminEvent : WechatWorkEvent, WechatWorkEvent.Types.IXmlSerializable
+    {
+        /// <summary>
+        /// 获取或设置应用 ID。
+        /// </summary>
+        [System.Xml.Serialization.XmlElement("AgentID")]
+        public int AgentId { get; set; }
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/EventSamples/Service/ChangeAppAdminEvent.xml b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/EventSamples/Service/ChangeAppAdminEvent.xml
new file mode 100644
index 00000000..9ea13d78
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Work.UnitTests/EventSamples/Service/ChangeAppAdminEvent.xml
@@ -0,0 +1,8 @@
+<xml>
+    <ToUserName><![CDATA[toUser]]></ToUserName>
+    <FromUserName><![CDATA[sys]]></FromUserName>
+    <CreateTime>1348831860</CreateTime>
+    <MsgType><![CDATA[event]]></MsgType>
+    <Event><![CDATA[change_app_admin]]></Event>
+    <AgentID>1</AgentID>
+</xml>
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