For public safety activities, there are both single point defense scenarios with concentrated areas and multi-point deployment scenarios with large areas and long distances. Based on years of experience in low altitude security, Kongyu Technology proposes the following two types of system solutions for such public scenarios: small area protection: equipment selection using radio+omnidirectional interference+jamming gun+radar (optional)+electro-optical (optional), equipment installed at high points within the defense zone, the system can monitor drones within a radius of 5 kilometers after operation, and drones within a radius of 3 kilometers can be driven away and forced to land; Defense zone protection: The equipment adopts a "2+1" mode (important deployment points at both ends+vehicle mounted mobile inspection support), and is installed at the high point of the important activity area. The vehicle mounted mobile station designs the inspection route and cooperates with the fixed station for protection. The overall system controls the large-scale and long-distance control range with drones to ensure that the activity process is not affected by drones; The system has technological advantages such as complex electromagnetic environment detection, simultaneous disposal of multiple targets, black and white lists, and drone positioning. It is mobile and portable to solve blind spots and line patrols, which is sufficient to ensure that public activities are not invaded by drones.