Abstract: In order to access information effectively and save energy consumption in the single target tracking of binary wireless sensor network (BWSN), a self-organization method named ADC (asynchronous dynamic cluster) for binary wireless sensor network is proposed. Under asynchronous condition, dynamic cluster is used to organize sensors to track target. The problems that target discovery and sensor nodes activation, construction and adjustment of the asynchronous dynamic cluster and calibration of the asynchronous time are deeply studied. The simulation analysis shows that the ADC algorithm has certain stability and convergence, it can ensure the tracking precision and reduce the energy consumption of the network.