Fuente: Wipo "BigData" The present invention relates to the technical field of database application, and discloses a power grid data processing method and system based on big data and graph database. The power grid data processing method comprises the steps of receiving a data operation service request through a unified interface; performing data routing on the data operation service request; executing data operation by one or more of the graph database, a cache database and a memory file system according to the data routing strategy, and obtaining one or more corresponding execution results; performing data aggregation on the one or more execution results, and obtaining a final result corresponding to the data operation service request. and outputting the final result through the unified interface. According to the technical scheme, optimization modeling is carried out for the power grid through various data processing means according to data characteristics and performance requirements of the power grid, business requirements of various different data types in the real power grid are satisfied by full utilization of the advantages of the various data processing means, and therefore the whole performance of the system can be largely improved.