Automatic alarm system based on video chat and realization method thereof

The invention discloses an automatic alarm system based on video chat and a realization method thereof. The alarm system comprises a terminal module and an alarm module which are connected through the Internet, wherein the terminal module comprises chat software; the chat software comprises an image capturing unit, a video signal collector and a display unit; a human face positioning trigger and a mark unit are also embedded in the chat software; the alarm module comprises a target server; and the target server also comprises a data storage unit, a human face identifying unit and an alarm unit. When a user performs video chat, the automatic alarm system can automatically lock a human face image and acquires the human face image, the human face image is transmitted to the target server through the Internet and is compared with the human face image of an escaping suspect in a database, and once the comparison is successful, the alarm unit is started, and IP (internet protocol) information and surfing time information are stored in the database. Therefore, the automatic alarm system can help policemen solve a case, a large quantity of manpower and material resources is saved, and the automatic alarm system has the characteristics of good real-time property and expandability.