Abstract: According the Modbus RTU data protocol provided by belt monitoring system of Ronghua NO.1 Coal Mine, it could not connect to the WinCC configuration platform directly. A kind of OPC server was designed, through the acquisition of Modbus RTU data, the server used the OPC protocol as the universal interface to access WinCC configuration platform. Finally, the access was successful for belt monitoring system and WinCC configuration network platform in the coalmine.