The realtime grid products are an important and necessary data sources for intelligent grid forecasting service, as the realtime grid products take the dual tasks of forecasting revision and forecasting product inspection. In order to meet the service requirements of meteorological applications and meteorological services for realtime grid products, various gird products are collected in realtime and standardized, and a WebGISbased realtime grid product application analysis platform is established using the Web techniques, such as JavaScript, HTML, CSS, etc. Based on the open source design idea, a framework of WebGIS supported by HTML5 is built by using Leaflet, Canvas and other technologies. All kinds of realtime grid products can be displayed on the same geographic information in this platform, and the display region can be conveniently switched among the whole country, provinces and different cities. The station observation data and station information from the CIMISS can be integrated and displayed in this platform, and more than ten thousand stations and over one million grid points can be easily drawn. The realtime data quality evaluation and analysis of the products are provided through the comparison and analysis between grid data and observations. Based on the grid points, the statistical analysis results (grid area and area ratio) in any region and different feature levels for any meteorological features are achieved, which are useful information for meteorological decision analysis and early warning forecast service in various disaster weather processes, such as heavy rains, high heat, severe winds, dense fogs, etc. Since the platform is put into application, it has provided great data supports for application and refinement meteorological services of all levels. As based on the national uniform data environment and parameter configuration, the platform has strong application and promotion value.