Airports, railways, bridges, ports, tunnels, frontier defense, prisons, forests, nuclear power plants, petrochemical and oil refining stations, museums, high-end properties, power stations, reservoirs, key warehouses and other areas are all national key protected infrastructure and strategic facilities; For example, the port and dock is an area where illegal activities such as theft, smuggling, smuggling and drug trafficking often occur. However, the night lighting illumination in the port and dock area is low, and there are many goods at the same time. It is difficult to monitor and search the port and dock area in a large area and quickly by ordinary visible light monitoring or human patrol, while thermal imaging monitoring has the characteristics of large range, long distance, strong detection ability and strong night monitoring ability, which can protect the safety of important facilities all the time, monitor key areas in a large range and remotely, and find illegal intruders in time.