Energy consumption is one of important issues in wireless sensor networks (WSNs). A non-uniform network topology model is firstly constructed, in which the nodes near the sink are deployed densely and have shorter communication distance. And then, for the random initial deployment, an energy-balancing based partition node re-deployment algorithm is proposed. By moving nodes within the intersected region, the proposed algorithm can reduce the distance of node displacement, lower the energy consumption, and raise the convergence speed. The experimental results show that the proposed algorithm can realize the better covering of the monitoring area with less number of nodes, attain the balancing of energy consumption, and raise the network lifetime.