Abstract: Provided is an intelligent AV type fire detection system for a large or high-rise building comprising smoke detectors, a controller, activated by any one smoke detector detecting a fire, alarms activated by the controller, image fetching devices wherein one image fetching device nearest the scene of fire is activated by the controller for generating an AV signal, and a communication module. The controller is adapted to generate an AV fire signal contained images from the scene of fire, and the communication module is adapted to receive the AV fire signal from the controller and transfer the AV fire signal to recipients including a fire department and a police department via a telephone company. The recipients thus can directly confirm whether a fire breaks out in a very short time, resulting in a saving of precious time for extinguishing fire.