Speed and accuracy of information access are essential in modern logistics operations. In this paper, the RFID technology is applied to logistics containers for keeping information dynamically, and the concept of information containers as opposed to logistics containersis put forward. In order to improve the efficiency of data access on tag, a set of RFID middleware named tag operation system (TOS) is proposed. Firstly, the tag memory is paged according to the length of the electronic product code (EPC). Secondly, a bitmap is built up in the tag memory to index the free memory space. Thirdly, the data storage format identifier (DSFID) is designed to make memory paging more flexible. Finally, real-time memory database is set up in the host computer to improve efficiency of tag data query. The experimental results show that TOS can greatly enhance the efficiency of the reader operations on tag. TOS can be widely applied to the applications of lifecycle management of articles.