When initially "220V Cooling Fan" is set to strong winds, according to strong natural wind running half an hour, and changed the natural wind, half an hour after becomes weak natural wind, until the preset end time, or turn off so far; When initially setting a stroke, according to the natural wind fan running for half an hour, then switch into low nature wind, until the preset time end or turn off so far; when the first "220V Cooling Fan" is set to weak wind, the fan press weak natural wind operation until the preset time end or turn off so far. From the perspective of software layers, is based on a previous time "220V Cooling Fan" status and user input to determine the type and speed of wind current time to be output. From a software driver layer perspective, it is to measure the wind speed value to the desired output of the software layer determines the current time wind type and speed.