The system has the functions of meteorological data error checking, data packing and so on based on the SCO Unix operating system and the modularized programming technique, combining data processing and sending on one platform, which greatly improves the efficiency of data transmission and reduces the workload of network maintenance and the FTP server load of the National Information Center. Furthermore, it can perform the error checking, data packing, and transmitting of special data (named by long file names) based on the SCO Unix operating system. The system fills up the gaps of Project 9210: the provinciallevel conventional weather data packing and long file name data transmission.