Seamless smart gridded forecast is the important content and support for the China Meteorological Administration modern weather operation. To enhance the application of gridded forecast in the forecast service operation, and improve the efficiency of the fine gridded forecast data visualization and analysis, we designed and implemented the Gridded Forecast Application Analysis Platform, analyzed the characteristics of the seamless gridded forecast data and the platform, adopted the browser/servce (B/S) design mode, and took key technologies such as the realtime distributed process computation, WebGL and GIS spatial analysis, achieving the functions such as the efficiently massive gridded forecast data process and analysis, web service, visualization, impact analysis, mapping and so on. This platform has already been stably applied in national and provincial meteorological decision service operations, such as, typoon, storm and other disasters emergency service, which has illustrated the platform’s strong practicability.