In this paper, we propose an optimized Cluster Radius Differentiation and Node Energy interval algorithm, the CRDNE algorithm. This algorithm is aimed to prolong the network lifetime of electronic guide systems by balancing nodes' energy. In our CRDNE algorithm, we divide the tour guide area into hot spots and non-hot spots by routing hops firstly. Then, according to the characteristics of different spots, we give different definition of cluster radius. At last, we select the cluster head based on interval energy. At the end of our paper, we also give simulation results by comparing CRDNE algorithm, LDCR algorithm and Leach-V algorithm to show the superiority of our algorithm based on Matlab.