The greenhouse is a man-made facilities, agricultural facilities to create a suitableenvironment for the growth of crops, it is not affect by the season, geographical, in order toachieve all-weather, off-season production. Make all-weather and off-season production. Themodern greenhouse adopt distributed control system, usually composed by host computer andlower position machine, transmit information by communication system. The host computerused for system management, mainly composed by database management...