The key area low-altitude defense system principally comprises surveillance radar, passive radio detection equipment, multispectral photoelectric cameras, fixed unmanned jamming systems, individual handheld jamming guns, and data acquisition and processing centers.The system is straightforward to set up and dismantle, with agile deployment options. It allows for the establishment of warning, alarm, and no-fly zones within the surveillance area.The system combines various detection technologies, offering multi-band, comprehensive, and seamless real-time monitoring. It provides a unified solution for safeguarding airports, oil and gas fields, storage tanks, border crossings, nuclear power stations, bridges, dams, critical government facilities, and major conference venues from unauthorized flights by drones, powered parachutes, gliders, and helicopters.