As a popular tourist city,Changsha has been developing rapidly in recent years.The ecological environment is the cornerstone of the development of tourism industry and regional economy.Only when the tourism industry,regional economy and ecological environment develop harmoniously,can sustainable development be realized.Based on the data of Changsha City from 2007 to 2018,the comprehensive evaluation index system of the three systems was constructed,and the coupling coordination of the three systems was analyzed.It is found that the development status and coupling coordination degree of the thr...