With the transformation and upgrading of industrial structure and the increasing development of service industry, tourism is becoming more and more important for the proportion of regional economic development. In recent years, Qingdao tourism develops rapidly, while promoting regional development, tourism chaos appears. For the high quality development of Qingdao tourism, it is very important to think about the existing problems and solve the problems encountered in the development of tourism. This paper will make a gray correlation analysis on various factors affecting the development of Qingdao tourism: resource advantage, infrastructure and market demand, analyze the impact of different factors on the development of Qingdao tourism, and draw a conclusion: The grey correlation degree of the total number of domestic tourists, air and railway passenger volume ranks the top three, indicating that these three factors play an important role in Qingdao's tourism development. The correlation degree between star-rated hotels and tourism development is the least, indicating that their impact on tourism development is not as great as expected. At the same time, combined with climate, policy and other factors, this paper puts forward suggestions for Qingdao's tourism development.