A new multi-sensor intelligent window control system was designed, in which STC IAP15F2K61S2 microcomputer was used as main control chip. By monitoring the indoor and outdoor environment through multi-sensor, the intelligent window could open and close automatically. Furthermore, the system also had the functions of waterproof, anti-theft, fire prevention, wireless remote control, timing, especially software upgrade based on IAP (In-Application-Programming) technology. The system has the characteristics of high degree of mechanical and electrical integration, strong robustness, low cost, easy to use, easy to maintain, etc.