A museum multimedia information system is designed not only for entertainment, bu also for education and research. Within the system, a huge number of intellectual assets is stored in a multimedia database. Users can query the multimedia database and retrieve information matching the specified conditions. In this paper, we successfully apply the EER (Extended Entity-Relationship) model to describe the entire system. We also propose multiple retrieval functions including browsing and query, for various users to access the information in a flexible and efficient manner. Finally, a prototype system is developed based on WWW client/server systems and the object relational DBMS UniSQL.