A method of storage CIM (Common information model) data is presented that based on RDF (Resource description frame) triple (Resource, Property and Value). The method organizes the classes, properties and relations defined in CIM and instances all as resources. The method storages the CIM data in object oriented real time database FastDB, in the database it defines several simple classes and relations mapping CIM classes. Through this way it avoids mapping of the complex topology structure and relations in CIM. The method not only complies with IEC61970 but also improves the design of the system and data accessing efficiency.