The invention relates to a competition timing and scoring system for an UAV (Unmanned Aerial Vehicle). The competition timing and scoring system comprises a first system, a second system and a remote controller; the first system comprises a first MCU, an LCD, a second infrared receiver, a priming inductor and a power supply plug; the second system comprises a second MCU, a solar panel, a rechargeable battery, a RF receiver, a score setting device, a horn, a second infrared transmitter, a first infrared transmitter, a firs infrared receiver and a three-color LED lamp bank; the remote controller is used for controlling the second system and comprises a third MCU, a battery, a RF transmitter, a work indicating lamp, a power-on control key and a shutdown control key. The competition timing and scoring system provided by the invention has the benefits that due to the adoption of the structure design, the UAV can effectively and accurately time and score in the flight competition; the time and a score of the participating UAV passing a test point are measured and displayed, so that contestants and spectators can conveniently and directly understand the manual computation situations; through arranging the solar panel, solar energy is adopted for power supply, so that energy conservation and environment friendliness are realized without considering the wiring difficulty.