1. A computer-implemented method performed by a first terminal for managing media resources, comprising: receiving, from a second terminal, a first relationship model associated with a user of the second terminal and describing hierarchically the content of a media resource, the first relationship model including: first topic nodes corresponding to first keywords describing the content of the media resource, a first resource node identifying the media resource, and first links connecting the first topic nodes and the first resource node; accessing a stored second relationship model describing hierarchically the content of a media resource associated with a user of the first terminal, the second relationship model including: second topic nodes corresponding to second keywords describing the content of the media resource, a second resource node identifying the media resource, and second links connecting the second topic nodes and the second resource node; determining whether the first relationship model contains a topic node or a resource node that is different from the second relationship model, based on whether a keyword of the first keywords is different from the second keywords; and when it is determined that the first relationship model contains the different node, updating the second relationship model to include the different node.