With the development of Internet technology, the number of the network users becomes more and more, and computer networks has to deal with an amazing amount of information every day. With database management system (DBMS) being used widely, many people put up with the multimedia extensions, for example, the multimedia technology which is based on the original vehicle. However, as for the meaningful queries for multimedia data semantics, these extensions are shortage of the methods to manage advanced indexing, content modeling and multimedia programming library. In this context, this paper introduces the
mpeg-7 multimedia database system , pointing out that the innovative part of the system is dependent on xml meg-7 standardized meta-data model , a new mpeg-7indexing and query system , designing application libraries which have query optimization and support internality and externality .Then it analyzes the expansion of the Oracle system , validates and demonstrates the two real multimedia applications that are applied in the field of audio recognition and image retrieval.