Numerical model has become the main direction of the development of weather forecasting. The numerical model calculation produces a variety of meteorological grid products. Meteorological grid products have the characteristics of a large amount of data, fast update frequency and strong professionalism. They need to be processed with the help of professional tool software, which can not meet the needs of enterprises and social users, and the application scope is greatly limited. Facing the contradiction between the specialization of meteorological grid products and the simplification of meteorological data application requirements, this paper proposes to apply WebGIS technology to meteorological grid products and services by means of Internet service, discrete processing of grid data and spatial management. Users only need to carry out simple text retrieval or GIS graphics retrieval on the client, and the system can realize the fine extraction of effective data in meteorological grid products and finally realize the fine service. This data processing method proposed in this paper plays a guiding role in applying meteorological grid products in different industries.