The invention discloses an equipment operation data matching and expansion method in combination with a power grid operation mode. The method comprises steps that S1, a unified data model is established; S2, the corresponding relationships among different system equipment are establish; S3, automatic matching between the equipment and the measurement information is carried out; S4, the measurementinformation is expanded according to the topological relationship; S5, the matched expanded information is stored in a fusion model. The method is advantaged in that an electric power system multi-source heterogeneous data matching system is established, the foundation is laid for state evaluation, diagnosis and prediction deepening research of fusion data development power transmission and transformation equipment based on different business system sources, basic guarantee is provided for development of an intelligent power grid, and the method is of great importance to stable operation of the power grid.