The Wireless Multimedia Sensor Networks(WMSN) routing design principles and strategies are introduced. The basic principles of optimal path are described. From the aspects of selecting the optimal path, the information forwarding strategy, energy consumption of nodes, the optimal path routing algorithm is designed. The experimental results show that the proposed algorithm is superior to the ant colony algorithm at energy consumption of the nodes, and the speed of information transfer. In particular, the pass rate increases by about 30%.