According to the issues of saving energy consumption of sensor nodes and balancing energy consumption of each node in the whole network, this paper proposed a wireless sensor network energy-saving method of integrating RFID design and optimizing the routing protocol. The method firstly respectively integrated RFID Tags and Readers with wireless Sensor Nodes as well as wireless devices, and then made the analysis and design for the strategy of the integration, and finally combined with the idea of the LEACH algorithm. The experiment simulation results demonstrated that the new proposed method was prior to the traditional LEACH algorithm in the terms of prolonging the network life cycle and reducing the energy consumption of the whole network.