Wireless sensor network optimizing method

The invention relates to a wireless sensor network optimizing method which comprises the following steps: planning monitored target nodes in a square area, randomly arranging sensor nodes in the square area to form a wireless sensor network, establishing a correlation model of the sensor nodes and the target nodes, and ensuring that the target nodes to which attention is paid are in the coverage area of the wireless sensor network; optimizing the life cycle of the whole wireless sensor network by utilizing the greedy algorithm; computing the whole square area by utilizing the expected probability to determine the minimal quantity of sensor nodes for completing coverage in the coverage area; and ensuring that the sensor nodes are in different states by adopting a state scheduling mechanism among the sensor nodes. Thereby reducing the energy consumption of the network, prolonging the life cycle of the network and realizing the optimization of the wireless sensor network. By adopting the method, the energy consumption of the network can be effectively reduced, and the life cycle of the whole network can be improved.