Abstract: Video image characteristics of gas and coal dust explosion are analyzed: Explosive fireball is usually red with high brightness, high temperature and strong radiation of infrared and ultraviolet rays, and area of the fireballs expands rapidly; Area, brightness, color, shape and radiation intensity of flame front are constantly changing; Area, color and shape of smoke and dust are constantly changing; There are objects that move or deform rapidly. Based on visible light video image, near infrared video image, far infrared video image and ultraviolet video image, a method of gas and coal dust explosion perception alarm and explosion source judgment is proposed: According to brightness and change rate of highlight area, area and change rate of highlight area, image shape and its change, image color and its change, gas and coal dust explosion are identified; Explosion source is determined according to image changes and time sequence of the changes and camera damage at different positions. A gas and coal dust explosion perception alarm and explosion source judgment method is proposed based on multi-information fusion of visible light video image, near infrared video image, far infrared video image, ultraviolet video image, O2, CO2, CO, temperature, sound, vibration, air pressure, wind speed, wind direction, smoke, dust, etc. The method reduces impact of fire, roadway lamp, miner's lamp, car lamp, red clothing, electromechanical equipment heat, fault discharge of electrical equipment and cable, coal and gas outburst, rock burst, large area roof fall, flood, blasting operation, coal falling on working face, coal transfer and transportation on gas and coal dust explosion identification.