The invention relates to a cache placement method and device based on CCN. The method comprises that a first interest packet sent by a user is received and analyzed, if a prestored data packet corresponding to the content name in the first interest packet does not exist, the content name is sent to a controller, a maximal cache decision index, a cache decision index for a present node and node information in an optimal path are received from the controller, the maximal cache decision index is stored in the first interest packet to generate a second interest packet, the second interest packet is sent to the next node in the optimal path, and a data packet which stores data corresponding to the content name in the second interest packet and the maximal cache decision is received and then sent to the user. Thus, path management and cache decision are realized in the overall network, optimal nodes are selected for caching, the network load is reduced, and the network caching efficiency is improved effectively.