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As the rapid development and wide application of Radio Frequency Identification (RFID) technology, the increasing data rates have imposed a heavy burden on interaction of the middleware system and network bandwidth. Furthermore, the lack of uniform standard for corresponding interfaces between the components of RFID system has seriously restricted performance of data interaction and processing in system interfaces. In order to overcome these problems, in this paper, we propose a framework of the RFID middleware system extended from Application Level Event (ALE) specification. Specifically, we design three modules and introduce them into the middleware system so that the abilities of data processing and intelligence of the system can be improved.