Abstract: RS232 serial communication was applied to implement data transmission between the weigh-in system of ground weigher and the computer.The data collection was accomplished by realization of serial programming through the application of Windows API Function.Data exchange with the background database helps fulfill works as the real time data display,automatic data collection,safe data storage,multi-access data search,data statistical treatment and data printout for the ground weigher.This system may avoid the possibility of malpractices to a great extent,function positively in the production and management process of enterprises,and provide enterprises with strong help to modern administration.