Abstract: A dynamic acquisition terminal for behavior statistic information of people in a building and an evacuation system and method. The dynamic acquisition terminal for behavior statistic information comprises a sensor, used for directly acquiring video information or audio and video information of people in the building; and an analysis component, used for performing analysis processing to the video information or audio and video information to dynamically generate people's behavior statistic information data. The evacuation system comprises a plurality of dynamic acquisition terminals for behavior statistic information; an escape route generation device, used for dynamically optimizing generation of an escape route at least based on the people's behavior statistic information data transmitted by the dynamic acquisition terminals for behavior statistic information; and an evacuation indicating system, used for dynamically generating and displaying evacuation sign information at least based on the escape route.