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How to make most use of existing information systems and set up low cost, open and flexible integration system have already become the key factor to constructing scientific and technical resources database system. Service oriented architecture (SOA) provides a solution to improve the reusability, scalability and efficiency in software development. This paper uses the SOA principle, through the research on SOAD modeling method of science and technology resources database system, and the optimal system modeling is found. The practice proved the system model has better flexibility and maintainability.