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diff --git "a/src/main/resources/neatlogic/resources/documentonline/zh/100.\347\263\273\347\273\237\351\205\215\347\275\256/\346\266\210\346\201\257\345\222\214\345\205\254\345\221\212.md" "b/src/main/resources/neatlogic/resources/documentonline/zh/100.\347\263\273\347\273\237\351\205\215\347\275\256/\346\266\210\346\201\257\345\222\214\345\205\254\345\221\212.md"
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+++ "b/src/main/resources/neatlogic/resources/documentonline/zh/100.\347\263\273\347\273\237\351\205\215\347\275\256/\346\266\210\346\201\257\345\222\214\345\205\254\345\221\212.md"
@@ -27,4 +27,26 @@
 
 ### 通知方式
 消息通知方式默认在通知列表中，另外还支持弹窗提醒。弹窗提醒状态包括关闭、临时还是持续。
-![](README_IMAGES/messagesAnnouncements/popup_reminder.png)
\ No newline at end of file
+![](README_IMAGES/messagesAnnouncements/popup_reminder.png)
+
+# 系统公告
+系统公告是系统通知，由管理员添加公告并下发后，所有指定的通知人都会受到系统通知，通知方式有仅在公告栏提示和全屏弹框提醒两种。
+
+### 添加公告
+点击添加系统公告按钮，公告配置中包括标题、内容和通知对象。
+![](README_IMAGES/messagesAnnouncements/notice_add.png)
+
+### 下发
+添加的公告只是一个模板，必须执行下发，才能通知到指定用户。
+
+公告下发的配置由公告生效时间和弹窗提醒。
+![](README_IMAGES/messagesAnnouncements/issued.png)
+- 生效时间：公告开始到结束的时间；若没有设置开始时间，即公告马上下方；若没有结束时间，公告会一直提示直到用户已阅。下图是下发成功后，系统公告栏的效果。
+  ![](README_IMAGES/messagesAnnouncements/notice.png)
+- 弹窗提醒：全屏弹窗提示，用户关闭弹窗即标为已读。
+  ![](README_IMAGES/messagesAnnouncements/popup_remind.png)
+- 忽略已读：再次下发公告时，不再下发给已读上次公告的用户。
+
+### 历史公告
+历史消息页面有历史系统公告。
+![](README_IMAGES/messagesAnnouncements/system_announcement.png)
\ No newline at end of file