The invention relates to a routing implementation method and a routing implementation device for a delay tolerant network. The method comprises the steps of determining residual energy of a node by primary energy of a node in the delay tolerant network, energy consumed for forwarding a message by the node, energy consumed for receiving the message by the node, and energy consumed for monitoring a neighbor node; recording a meet interval sequence between two nodes in the delay tolerant network to acquire a historical meet interval within a preset update period, and updating the historical meet interval; computing a utility value of the node according to residual energy of the node and the historical meet intervals; and forwarding the message to the node according to the utility value of the node. According to the routing implementation method and the routing implementation device for the delay tolerant network provided by the invention, the message can be forwarded according to the energy utilization condition of the relay node to improve an energy utilization rate.