Nowadays, customers are the central core of the business. Most of the pioneer organizations consider customers satisfaction as their central part of the goals, systems and decision making process. In the past, customer was just the organization's goal in achieving more market share, but today by the expansion of IT tools and strict and sometimes deadly competition atmosphere in which organizations must change fast to survive, customers are more than that. Their role has changed to the strategic partner of the organization and they help the organization to progress in the organizational expansion path, promote organizational excellence and create new products. So, customer satisfaction is one of the most important factors of success in an organization. After achieving the potential of absorbing customers their satisfaction must be watched continually. In fact, the aim of evaluating customer satisfaction is reaching an appropriate feedback of managing and leading the organization in order to increase customer satisfaction and conceive and remove their dissatisfaction. This research starts with showing the importance of the customer and his satisfaction and then continues with introducing customer satisfaction measurement models and tries to use fuzzy TOPSIS techniques to rank models and choose the suitable one for a specific organization. To clarify more, the mentioned stages were done in Jahad-e-Keshavarzi Organization of qazvin province. The results showed that SERVQUAL model is a suitable model for the motioned organization. Also the customer satisfaction value was determined and the weak points of the orqanization were recognized. At last some improving procedures were suggested.