The paper introduced the structure and production, localization parameter settin g, transporting processing of data and services of the system on disaster weathe r warning and nowcasting by new generation weather radar in the flood season of 2007. The system was developed by Chinese Academy of Meteorological Sciences and introduced by Henan Meteorological Observatory in 2007, which could not only di splay the commonly used production but also create a series of services producti on such as identification of reverse wind region, mesocyclone, rainstorm echoes, squall line, storm and heavy hail, nowcasting of precipitation from 1 to 3 hours, extrapolation forecast of echoes, area rainfall using radarraingaug e and the consensus of estimating rainfall by fully using the base data of the n ew generation weather radar. Therefore, it has obvious guiding and warning funct ion in monitoring and early warning the severe convection weather and is one of the indispensable tools in our practical operations.