The purpose of this study is identify factors affecting the tourism industry in Iran and prioritize them by the AHP method.There are 4 main factors and 8 indicators that affect these factors. Of course, it should be pointed out that these factors may vary according to the culture and politics of different countries. The five main factors in terms of prioritization are as follows: 1. Policy and institutional factors, 2. Economic factor , 3. Organizational factor, 4. Social and cultural factors. The main factor is Policy and institutional. Therefore, according to these studies, the main factor that managers and investors must understand government policies about the tourism industry before making any decisions in this industry and make their decisions based on them so that they will not fail in the future. But, the least value is about Social and cultural, but this does not mean that it should be ignored. Each of the above factors should be considered in its place, and the lack of attention to any of these may put the tourist industry in recession.This research can help you better decide on the development of the tourism industry and advancement in this industry and provide the basis for future research.