The invention relates to the technical field of unmanned aerial vehicles and provides an unmanned aerial vehicle hover system and an unmanned aerial vehicle hover method. The unmanned aerial vehicle hover system comprises a target beacon and an unmanned aerial vehicle, wherein a vehicle-mounted recognition module is mounted on the unmanned aerial vehicle; the vehicle-mounted recognition module iselectrically connected with a fly control device of the unmanned aerial vehicle; an infrared ray emitting device for emitting infrared rays is mounted on the target beacon; the vehicle-mounted recognition module is used for photographing infrared rays to obtain images with infrared light spots, and used for recognizing position information of the infrared light spots; and the fly control device isused for adjusting flying positions of the unmanned aerial vehicle according to the position information, and thus the unmanned aerial vehicle can hover above the target beacon. Compared with the prior art, the unmanned aerial vehicle hover system provided by the embodiment of the invention is free of influence of imprecise positioning caused by relatively weak or unstable GPSs (Global Positioning Systems), and meanwhile is capable of hovering unmanned aerial vehicles in dark environments without light.