The design and implementation of a personalized information retrieval agent, DOLTRI-Agent (distance and open learning training resource information agent), is introduced in this paper. DOLTRI-Agent is to retrieve training resource information for DOL (distance and open learning). It is based on the multi agent architecture, including three sub agents and three other components. DOLTRI-Agent system owns the autonomous functions of information retrieval, maintenance and updating. Furthermore, it has the feature of personalization: it can continuously learn user knowledge, such as user interested information fields and user's babits; can also utilize this knowledge to provide the personalized information services and interactive interface.