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In this paper, an intelligent video surveillance system is designed and implemented in dynamic complex background based on the target detection algorithm of double symmetrical frame difference and the target tracking method based on compressive sensing. This system, based on target detection, has functions such as local moving objects extracted from local video file and compression to reduce playback time, local or network camera data real-time playing and processing, real-time area intrusion detection and alarm according to the change of illumination to dynamically adjust the binarization threshold. This system, based on target tracking, also has functions such as tracking the selected target in dynamic background, controlling monitoring PTZ through the client manually, tracking the invasion target independently with large angle,. The results showed that the system can accurately detect and track moving target in daily complex environment, have great practical needs in smart home and mobile security field.