The Energy efficiency is a critical issue which confronts the wireless sensor network (WSN). A lot of research work on reducing power consumption at WSN MAC protocols is present till date. Generally, WSN sensor nodes might go through different scenario requirements such as mobility and traffic requirement. The adhered problem and energy consumption requirements in WSN highlights the need for robust MAC protocol. This paper aims to reduce the power consumption of the B-MAC protocol by utilizing multi-objective optimization method named; the Differential Evolution (DE) algorithm for multi-scenarios WSN. Further, simulation experiments are carried out on the discrete event simulator OMNET++ for the purposes of this paper. Moreover, the experimental analysis shows the improvement the energy consumption of (DE-BMAC) for two scenarios without an effect of performance network.