本系統用網絡攝像機監測視頻移動，用來追蹤兩個連續的畫面。比較其不同，如果差別大于預先設定值，則敲響警報。用麥克風監測大的聲響，如果存在一個持續時間超過預定時間的大的聲響，則敲響警報。如果視頻和音頻警報響起，則報警信息則會傳到
用戶的通信軟件（MSN）上，這個軟件（MSN）與一個視頻/音頻播放器地址相鏈接，用戶可以通過一個網絡瀏覽器在任何時間、任何地點監控實時的視頻/音頻情況。本系統是采用Java 實現的。
關鍵詞：在線監測；MSN；即時通信軟件；服務器；協議

Abstract: Detect and verify the robbery/intrusion. Detect video motion, this application
keep tracking two consecutive frames, count the difference and if it is larger than a pre-set
threshold, set video alarm. Detect strong sound, if there is exists a strong sound lasting more than a threshold time, set audio alarm. If video alarm and audio alarm are on, an alert message will be sent to the user’s MSN Messenger along with a Web audio/video player URL link which user can click on it and play real time audio/video. User can monitor the real time audio/video remotely through an internet browser at anywhere and anytime. System is adopted with Java realization.
Keywords: Detection online; MSN; Servers; Protocol