Method and system for tracking suspicious person

The invention provides a method and a system for tracking a suspicious person. Human face information of all staffs in a current frame video image is obtained by scanning and is stored in a memorizer, then Information of all human faces of a next frame is obtained, the information of all the human faces of the two frames is compared, and when the information of a new human face appears in the information of all the human faces according to judgment, a camera is controlled to rotate so that the new human face is always positioned in the central position of the video image. The suspicious person tracking technology can perform continuous monitoring by using less cameras without losing the target, ensures the continuity of tracking, also ensures the accuracy of tracking by comparing the human face information, and performs the monitoring and the tracking without the monitoring person not to observe and monitor the picture at all time, thereby saving the cost.