In order to satisfy the operation and more and more service need, and based on the typhoon operational criterions of CMA, the Typhoon Operational Application and Prewarning System, i.e. TOAPS was established using visual program. During its construction, TOAPS adopted the newest research achievements about typhoon and combined with multi-years practice experiences of Jiangsu provincial observatory. TOAPS has powerful function due to the system integrated many good modules, for example decoding module, showing module for multi-track from different forecast center, publishing module, historical comparability search, class conception pattern of landfall typhoon, center orientation using nephogram and other assistant tools. After three years(from 2003 to 2005) operational verification, TOPAS was proved that the system is very stable and reliable with low need for hardware and software environments. In addition, the system has also excellent transplantable, operable and automatic capacities. In recent years, TOAPS played a very important role in operation and special services in Jiangsu provincial observatory.