Graphic Displaying and Analyzing System of Jiangsu Real-time Water Regime,which is developed by using Mapbasic and Visual Basic language and under the support of MapInfo,can visualize rain condition and water regime on Electronic Map through access to remote real-time water regime Sybase database and data processing,which makes a real-time reflection on the rules of the distribution of rain condition and water regime in time and space.Moreover,the system provides the function of generating visualization map of rainstorm distribution,rainfall isoline,statistics and analysis of rainstorm features.In addition,the system also provides comparison and analysis of the present characteristic values of real -time rain condition and water regime versus those in the past in order to provide a scientific basis for the decision-making of flood control.