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In wireless sensor network (WSN), the reliability and energy consumption of nodes are very important parameters to extend the lifetime. This paper proposes a concept that balances reliability and residual energy to control the success rate of message transmission. By formulating the weights of the reliability and remainder energy, the reliability-energy metric is designed to measure routing path and an efficient algorithm is developed based on Dijkstra algorithm to search a reliability-energy disjoint path set. The simulation shows the proposed algorithm is effective and efficient.