The HC-521 vertical takeoff and landing unmanned aerial vehicle system is mainly aimed at industries such as power, oil, urban transportation, maritime, public security, and fire protection. It meets users' needs for small-scale unmanned aerial vehicle systems in areas such as regional monitoring, road inspection, aerial photography, disaster relief, and emergency command. Due to the use of vertical takeoff and landing, the requirements for the takeoff site are greatly reduced, while also demonstrating the advantages of fixed wing drones.