The electric smoke vent uses the detection signal of the smoke sensor to transmit it to the controller, and the controller commands to drive the motor to open the window; at the same time, due to the physical properties of the heat and smoke rising, and the negative pressure of the air, the smoke and heats exhaust out the window. This kind of automatic opening vent is suitable for modern factories, supermarkets, shopping malls, ecological hotels and other industrial and civil buildings such as lighting, ventilation and heat dissipation, smoke exhaust and dust extraction; fire-fighting smoke ventilation can also be used in airports, railway stations.