The invention discloses a security system for mobile phone video, infrared detection, tracking and monitoring, remote alarm and visible call based on three generation (3G). The security system comprises a front built-in camera, an infrared detector, a video identification server side, a sound/video code stream server, a 3G visible wireless talkback center server, a 3G wireless data transmission module and a mobile phone client and is characterized in that on the basis of the built-in camera, the infrared detector, the video identification server side, the sound/video code stream server, the 3G visible wireless talkback center server, the 3G wireless data transmission module and an intelligent information management system of the mobile phone client, the problems of mobile phone monitoring for enterprises and shopping malls, mobile phone remote observation on kindergartens, nurseries and other places, mobile phone nursing on children and the old, mobile phone security monitoring on houses and villas, and mobile phone on-line watch on vehicles at any time and at any place are solved; the daily management of places such as the enterprises, the shopping malls and schools can be standardized, the management cost is reduced, and the management efficiency is improved; moreover, due to the unique characteristics of stability and unmanned watch, a user can access and browse the mobile phone, the existing local area network and the wide area network at any time; therefore, the security system is popular in end customers and project developers.