Based on the big data video retrieval technology and the deep learning target detection algorithm, the smart analyzer can, at terminals, realize self-adaptive target collection and identification for the pedestrians, vehicles and lost things in complicated scenes and be highly sensitive to the special people or abnormal behaviors in monitored scenes, including identification of pedestrian attributes, abnormal behaviors such as knife or gun taking and climbing, illegal behaviors such as gathering, killing people with knives and shooting with help of the video abstract retrieval, mining and analysis technologies of the background supercomputer server.