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Unmanned aircraft, abbreviated as "UAV" and "UAV" in English, is an unmanned aircraft operated by radio remote control equipment and self-contained program control device, or operated completely or intermittently by on-board computer[ 1] Compared with manned aircraft, UAVs are often more suitable for tasks that are too "stupid, dirty or dangerous". According to the application field, UAV can be divided into military and civil. In military terms, UAVs are divided into reconnaissance aircraft and target aircraft. For civil use, UAV + industrial application is the real demand of UAV; At present, the application in the fields of aerial photography, agriculture, plant protection, micro selfie, express transportation, disaster rescue, observation of wild animals, monitoring of infectious diseases, surveying and mapping, news reporting, power inspection, disaster relief, film and television shooting, manufacturing romance and so on has greatly expanded the use of UAV itself. Developed countries are also actively expanding the industrial application and development of UAV technology. In September 2018, the 62nd meeting of the Harmonized System Committee (HSC) of the World Customs Organization decided to classify UAVs as "flying cameras".