The application of Semantic Web technology brings an unprecedented opportunity and a challenge to Multimedia Web-based Information Systems (MWIS) [6]. This paper presents an ontology-based framework (OFAUMP), focusing on the coupling of the dynamic presentation model and user model that are the main components of MWIS, in the environment of the Semantic Web. In OFAUMP, Private ontology (i.e. user profile), transferred between user terminal devices and a special server, is automatically constructed for each user and shared by web sites/applications in order to realize user adaptation. We optimize Geurts [3] approach to automatically and intelligently generate multimedia presentation with the redefined domain, discourse and media knowledge. To combine the two models mentioned above, a new ontology is introduced, where usable resource for each kind of user and user’s route are described. This framework achieves the aims of dynamically selecting and presenting the multimedia data according to user profile in the Semantic Web.