Design of an intelligent "220V Cooling Fan" temperature control system to solve. Temperature-controlled fan system is to automatically open and close the fan according to the prevailing temperature conditions, it can be very good save energy, but also facilitate the users to use more humane. And in industrial production, daily life has widely thermostat "220V Cooling Fan" systems, such as cooling systems in large-scale industrial production of machinery and equipment, or limit intelligent CPU fan on the laptop and other microcontroller-based temperature control " 220V Cooling Fan"will be able to start the level automatically according to ambient temperature or stops, and automatically adjusted according to changes in temperature to achieve speed, with a very wide range of uses in real life, so it's designed to have a certain sense of value.