Based on the comparative analysis of the evaluation methods of quality management system at home and abroad, combined with the current situation and demand of the quality management system in iron and steel product manufacturing enterprises, and taking the production process as the breakthrough point, a quantitative evaluation model for the effectiveness of the quality management system was developed. The model took ISO9001IATF16949 standard and customers′ specificity as its starting point. On the basis of demand and 5M1E theory, through the use of quality function house and expert scoring method, it broke through the industry problem of weightless standard terms. Through two years of operation, the operation level of the quality management system had been improved, and it had good popularization and application value.