In order to facilitate the military representatives to daily supervision on the effectiveness of quality management system of equipment manufacturers, studying on the assessment model for its effectiveness. On the basis of the excellent performance evaluation model and combining the military acquired quality information of equipment quality supervision, this paper constructs the assessment model of the effectiveness of quality management system of equipment manufacturers from 3 aspects, namely the equipment quality management foundation, the process control of equipment quality, and equipment quality result. Moreover, maturity level method has been used in the effectiveness assessment and an example has been used to verify it. The results show that this assessment method is better to ensure the quality of weapons and facilitate daily supervision on the effectiveness of quality management system of equipment manufacturers.