The invention relates to a method for establishing IEC61970 GID (general interface definition) interface. The method comprises the following steps: 1, establishing an information model, wherein the information model describes basic data objects which are accessed through the GID interface service; 2, establishing basic access service of model information so as to realize GID general and public reading and writing access services which is generally used for accessing basic model data; 3, establishing an HSDA (high speed data access) interface and a TSDA (time sequence data access) interface so as to further access real-time data and historical data besides reading and writing access, realized in the step 2, of the model basic data. By the method, standard data access mechanism is provided for an electric energy quality monitoring system, interconnection and intercommunication among systems are realized, and high compatibility of the systems is guaranteed. By the method, the development efficiency can be increased, so that the program interface is more simple and compact, and the operation is more efficient, so that the development cost and the maintenance cost are reduced and the expenditure is saved.