To make "220V Cooling Fan" This becomes more intelligent household appliances, mainly on having the temperature control fan speed automatically size, automatic switch-enabled smart fan design and production. STC89C51 microcontroller design the "220V Cooling Fan" automatic control system, using DS18B20 digital thermometer for temperature testing, infrared receiving control signals to achieve the fan control. The system has changed the traditional manual control of speed and fan switches, automatic control depends on the temperature, easy to use in the summer when people go to bed at night. The "220V Cooling Fan" stable, can be applied to real life.