In order to automatically acquire generalized data，a kind of generalized data management model used for intelligent processing is studied.Confronted with the multiple types and complex structure of generalized data，the management model achieves its purpose by establishing the internal relations between different generalized data，while the storage，analysis and use of generalized data are handed over to the corresponding application systems.As the relationship between the generalized data is complex and varied，the existing power grid knowledge modeling methods are incapable of meeting its requirements.Based on the ontology theory and semantic web technology，the logical basis of the model structure and various components，and the ways of modeling and application are discussed.The effect of using the model is shown through a case study to be applicable to many kinds of heterogeneous power grid data resource management and retrieval and easily expanded.