The invention discloses a content caching method and a content caching device for a content center network. The method comprises the following steps: determining a shortest path between a content request node and a corresponding content providing node, and determining all the content nodes on the shortest path; determining the node betweenness of the content nodes in turn, and taking the content node with the maximum node betweenness as a center node; and when the storage space of the center node is full, determining the caching probability of effective content nodes in turn, and caching target content according to the caching probability, wherein the effective content nodes are content nodes between the content request node and the center node, and the target content is content requested by the content request node. Through the method, the situation in which target content is cached to all nodes is avoided, and caching redundancy is avoided effectively. Moreover, cache placing nodes are arranged according to the caching probability, the content access speed of the content request node is increased, and the overall performance of the network is improved.