The invention discloses a meteorological data analyzing and processing method applied to a power system. The meteorological data analyzing and processing method includes steps of setting up a standard specification meteorological data interface; acquiring and accessing to meteorological data via the data interface by power grid GIS; processing different formats of meteorological data, converting into data formats which can be stored and directly displayed by the power grid GIS and storing the same into a power grid GIS meteorological database; analyzing different formats of data in the power grid GIS meteorological database respectively and storing the analyzed data into a foreground server; expanding range of the analyzed data by means of gray enhancement and expanding discrimination of the values. The meteorological data analyzing and processing method has the advantages that various meteorological data analysis standards including XML, TXT and binary format are set up, and the meteorological data analyzing and processing method is applied to power specialization, provides basic guarantee for display and early warning of meteorological information of the power grid GIS platform and lays foundation for data interaction between the power industry and the meteorological departments.