UAVs can be divided into military and civilian according to their application fields. In military, UAVs are divided into reconnaissance aircraft and target aircraft. For civil use, UAV+industrial application is the real demand for UAV; The application in aerial photography, agriculture, plant protection, micro self photography, express transportation, disaster rescue, wildlife observation, infectious disease monitoring, mapping, news reporting, power inspection, disaster relief, film and television shooting, romantic manufacturing and other fields has greatly expanded the use of UAVs.