The invention belongs to the technical field of smoke-controlled and light-controlled automatic opening and fire extinguishing devices and particularly relates to a fire extinguishing device for automatically opening a fire extinguisher by transmitting signals through a smoke sensor and an infrared scanner. When a fire happens just now, a flame is not seen while dense smoke occurs, a smoke contactor inside the smoke sensor connects a circuit of a positive rotation contactor, and a motor opens the fire extinguisher under limit control of the motor. When a fire happens just now, the flame is large and the smoke is little on the site, at the moment, the infrared scanner connects an integrated circuit positive rotation contactor inside an integrated circuit board, then the integrated circuit positive rotation contactor connects the positive rotation contactor, and the motor opens the fire extinguisher under limit control of the motor. According to the smoke-controlled and light-controlledautomatic opening and fire extinguishing device, the information is transmitted to the contactors accurately through the smoke sensor and the infrared scanner when the fire is in the bud, and the motor opens the fire extinguisher to extinguish the fire. The loss of life and properties of people is reduced to the minimum.