Abstarct: Nowadays, recognizing of customers and choosing appropriate market, plays a decisive role in the providing of the goods and services, development of the market , sale enhancement, productivity and advancing the noble objectives. Making a Right decision about activities in different market segments considering the consumers' purchasing behavior simply will be able to predict both process of activities and future of the company. . Therefore, researchers have been focused to provide methods and strategies for improving decision-making power in choosing the correct market. Managers consider several criteria when selecting a different kind of market segments for providing a variety of products and services, determine the acceptability of customers for this criteria, correct prediction of the Company's market share in the commercial activities, will present. The initiatives of this research is using of the Net Promoter Score baxsed on gray numbers and rankings market segments by the COPRAS-G decision techniques, That are used in targeting and positioning the company to enter a new market or continue their activities according to short-term , medium-term and long-term goals of the managers.