"220V Cooling Fan" growing refinement in style, function and other aspects, and towards a healthy, safe, multi-functional, energy-saving direction. Toilet due to low prices and relatively low power consumption, easy to install and use, the majority of China's population in rural areas still use fans as a cooling device heatstroke. But now "220V Cooling Fan" on the market is mostly all-hardware circuit, there is a circuit complexity, single function and other limitations, it is necessary to improve the existing controller. Design a temperature intelligent fan control system, when the temperature is above 25 ℃, automatically open fan; below 25 ℃, automatically shut down "220V Cooling Fan". You can also set the temperature limits in the software, and display real-time temperature, proved that the system of low cost, high reliability, and realize the weak control the strong power, a higher value.