Abstract: In order to make the network of ammunition attack the target intelligently, a method that combined the target tracking with target optimization assignment algorithm was investigated in this paper. First of all, the target trajectory tracking was realized based on the interacting multiple model (IMM); the uniform turning motion and uniform velocity motion model was established. Simulation and analysis show that the IMM tracking effect is well. Then, the combination efficiency function was obtained corresponding through the position information, the moving state of tracked target and the working state of network of ammunition. Finally the attack decision was made. The problem of attacking the moving target can be solved well by this method.