A automatic fire unit based on comprehensive vision sensor comprising microprocessors, video frequency sensors for the surveillance, communication modules used to communicate with the outside world and firefighting nozzles, the firefighting nozzle is connected to drives, the video frequency sensor is a multi-dimensional visual sensors, dispose and analysis images, make a comprehensive judgment through the simple pattern classification, the flame area characteristics judgment, the flame physical characteristics judgment, flame color judgment, the law of flame flashing judgment, flame movement characteristics judgment and judgment of the fire intensity, automatically adjust the nozzles according to flames position and spray extinguishing agent assigned in the vicinity of the fire source. The invention can effectively reduce the false fire alarm rate, inspect and locate accurately, with good real-time performance and automatically control the nozzle spray fire-extinguishing agent to the flames found in the shortest time, the achieved detection and control is simple.