The Flood-Causing Torrential Rain forecasting and warning system for Huaihe River and it′s method are introduced. Rainfall was estimated by using of satellite and CINRAD-radar data.. Furthermore, form GMS-5 Multi-Channel data, we developed the empirical formula of rainfall measurement using statistic method in Huaihe River field. And then, combining the HLAFS data, Flood-Causing Torrential Rain were forecasted and warned. The system was tested by the application of flood season in 2003 and good service effect was received.