Intelligent "220V Cooling Fan" control system, refers to the fan motor speed is controlled as the amount of analysis collected by the T89S52 microcontroller digital temperature signal, and then through the SCR of fan motor speed. So as to achieve without human control will automatically adjust the size of the effect of the wind. It T89S52 microcontroller core, the ambient temperature by a temperature sensor for data collection in order to establish a control system that allows "220V Cooling Fan" with temperature changes automatically change gears, to achieve "high temperature, wind, low temperature, Wind weak "performance. In addition, you can set the minimum working temperature fans within a certain range by remote users, when the temperature is below the set temperature, "220V Cooling Fan" will automatically shut down when the temperature is higher than the fans to start afresh. So that the ordinary fan is more powerful, make operation simple, intelligent, and more environmentally friendly energy.