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The efficient and reliable information service provision and utilization is an important infrastructure in the high-assurance information service system. In this paper, we introduce a rating oriented distributed information system sustained by push/pull mobile agents to cope with providers' and users' heterogeneous requirements. Based on this environment, autonomous information provision technology is proposed. However, when users' demand changes, congestion might arise in the system. In order to achieve load balancing for users' timeliness access and guarantee that users can always get the information from a certain pathway, autonomous information reallocation technology is proposed.