The invention relates to the field of meteorological application of electric power systems, in particular to a professional meteorological service application platform based on a power grid GIS. The platform includes a data acquisition and conversion module, a data storage module, a professional service adding module, a professional service module and a page display module; the ideas of modular design and object orientation are adopted, and according to the needs of business expansion, function modules can be flexibly added or modified without affecting original business, so that the system is good in function expansibility; when the current configuration of the system can not meet the function implementation need or the overall performance of the system is reduced, the expansibility can achieve smooth upgrading of the system by adjusting hardware configuration or increasing servers, so that the overall performance of the system is extended. The system can perform equipment model selection and flexible configuration according to the user quantity and the function implementation need and is scientific, rigorous and flexible.