Building evacuation method and building evacuation system

A building evacuation system, comprising:

• a plurality of the sensors are arranged in a region at positions of different viewing angles such that between the plurality of the sensors, there are continuous fields of view that are adjacent to each other and partially overlapped with each other;
• a processing unit configured to process image data of the region captured by a the plurality of sensors to track a moving state of people in the region;
• a matching unit configured to match an object specified by at least one abnormal mode and detected in the moving state of the people with the abnormal mode;
• and
• a responding unit configured to generate an indication representing an abnormality of evacuation behavior based on the abnormal mode after being matched.