This article improves on the energy-consuming equation and nodes’ energy states in the old energy model of Ad hoc networks, which concerned of the nodes’ energy consumption in listening and idle period, and enhances the comprehensive of solving energy problem in this area. In the communication range of a node, where include the??nodes could reach the nodes’ signal, setting the highest energy-state node as an Agent will reduce the number of Agent in old save-energy model, and for improving the surviving time of the net, we added a new conception:??edge-agent. The experiment indicates that the new energy-saving model cut down the idle nodes` energy consumption, declines the probability for nodes becoming agent-nodes, and increase the whole net’s surviving time and the stability of communication because of using edge-agents.