The invention relates to a unmanned aerial vehicle haze detection eliminating system, and the unmanned aerial vehicle haze detection eliminating system comprises a particle spray gun, PM2.5 detector, an air temperature detector, a radio dispatcher and a processor, the particle spray gun is used for spraying fog eliminating particles, the PM2.5 detector is used for detecting the concentration of the PM2.5 in the air, the air temperature detector is used for detecting the air temperature, the radio dispatcher is used for receiving the cruise position from the local environment protection management control platform, the process is connected to the radio dispatcher for controlling the unmanned aerial vehicle to the cruise position, the processor is connected to the particle spray gun, PM2.5 detector and the air temperature detector respectively for controlling the particle spraying condition of the particle spray gun according to the detection result of the PM2.5 detector and the air temperature detector. According to the unmanned aerial vehicle haze detection eliminating system, suitable strategy can be formed according to the actual condition of the haze in the air for ensuring the haze eliminating effect.