Its functions include automatic detection of fire, automatic positioning of fire origins, automatic extinguishment at fixed points and on-site monitoring. It involves the application of infrared sensoring technology and the fire detecting technology of dual-band images, which are cutting-edge in China. It makes use of a three-level alarming strategy and has achieved extremely high accuracy and reliability. Within 20 seconds after a fire occurs, the detection, the positioning of the fire point and the alarming can be accomplished and the water spray begins. The fast response speed can gain precious time for fire rescue.