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Radio Frequency Identification (RFID) technology that is used in pervasive computing environments is widely concerned in recent years. At present, RFID technology is mainly applied in logistics, manufacturing, public service industry and so on. Based on the characteristics of pervasive computing environment, in this paper, a RFID context-aware service model is proposed. The model combines Ontology Language OWL with CC/PP and FOAF specifications to build a context model. Context ontology includes domain ontology and RFID tags ontology. On this basis, the context reasoning and interpretation mechanism based on ontology and rule is introduced. Through the rewritable RFID tag memory, dynamic management of the context in RFID system is realized. Finally, examples are used to demonstrate the feasibility of the model.