Using select statement of SQL Server and bcp data processing method,the real-time precipitation is calculated based on meso-scale precipitation data.Grid point precipitation of subbasins was obtained by GIS technology,hence the area precipitation of subbasins was formed.The computation results show that,daily real-time precipitation can be acquired through employment of SQL Server data inquiring technology and bcp data processing technology,and the slope and elevation data with spatial resolution of 5km can be obtained by GIS splicing,conversion and sampling process.Then the area rainfall computation equation is established with real-time precipitation and related slope and elevation,and the area rainfall is further accurate through calculation with Arithmetic Mean Method (AMM).