In order to verify the reliability of homing and fuse system of homing depth charge, the mathematics model of Bayes reliability decision is established in this paper. The prior information of this system reliability is extracted according to MML, and then the plan of reliability verification test about homing and fuse system is worked out in terms of maximum ENGS. In view of the result of example calculation, the plan of reliability verification test obtained according to the method of this paper is reasonable and feasible, and saves the time of 36.55 percent and 17.45 percent respectively compared to the plan of national military standard.