With the development of Internet technology, the sharing of multimedia resources has become mature. More and more file formats and devices can be shared and easily accessible. To establish a large sharing network, all sharing nodes must be effectively managed and the quality of services for the Client end must be guaranteed. However, in practice, the network environment is constantly changing, so it is difficult to maintain the information on each node. This paper proposes a multimedia resource sharing architecture in WAN. Apart from overcoming the instability problem of the network, this architecture has the advantages of self-organization, self-repair and self-accreditation. Therefore, users can maintain the network more easily and, with the aid of relevant mechanisms, improve the service quality and the overall efficiency of the network.