The invention relates to a power grid heterogeneous data integration and consistency monitoring method. According to the method, a power grid heterogeneous data push and integration module and a data consistency monitoring module are both connected with a database. With the power grid heterogeneous data integration and consistency monitoring method provided by the invention adopted, the consistency of integrated data and the data of a source system maintains at 99.9%, and after manual processing is performed, the data can be completely consistent; in more than one year of the use of the method, data are integrated together, grassroots employees only need to use a system to complete daily work, multi-system switching which is brought by part-time job problems can be effectively realized; after the data are integrated, the consistency of the data is guaranteed, data required by decision-making levels and leadership levels can be provided; cross-disciplinary data support can be provided for the professional management of a power grid; the use of an information system is simplified, grassroots professional production staffs can concentrate their energy and time on the production tasks of the power grid, and the system provides effective support for production.