The characteristics and development trends of UAVs are introduced. For the problem that energy supply of small UAVs is insufficient,the current situation of laser wireless energy transmission is introduced,and the system structures of laser wireless energy transmission for UAVs are summarized. The efficiency and the influence factors of the laser wireless energy transmission system for UAVs are analyzed. According to the existing tracking methods,a new kind of acquisition,tracking and pointing method based on cooperation target is put forward.