"High-altitude anti-falling device" is a set of automatic device preventing high altitude objects from falling. This automatic device mainly consists of three parts, the falling object detection and recognition system(ODRS), the action control system and the pneumatic structure system. It is a good combination of both electronic technology and mechanical technology. The ODRS detects and recognizes objects. The action control system decides what to do. The pneumatic structure system is execution system to receive the falling objects.