During emergency rescue command, large-screen high-definition real-time display of rescue maps, real-time on-site images, emergency rescue and other information is required to help leaders make decisions and command. Through the large-screen display control system, the large amount of information, high data flow and multi-channel monitoring can be flexibly and conveniently displayed on a comprehensive information display interface with rich content, accurate and efficient information, and information sharing is realized, which is convenient for unified command and dispatch, so as to ensure the entire command and control system. The system has linkage, efficiency and integrity。