The purpose of this study is to establish the new concept of "user-centered" suitable for currentdigital environment and to derive system design factors necessary for user-centered informationretrieval system design of the university libraries.The result of this study can be summarized as follows .First, the concept of 'users-centered' in digital environment where the supporting role ofintermediaries is growing bigger than before in the interaction with remote information retrievalsystem can be defined as the new concept of 'expansion of knowledge'.Second, 6 kinds of system design factors derived for user-centered information retrievalsystem design of the university librariesf the university libraries.
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