Abstract: Based on the meteorological data of 15 major tourist cities in China for 1960-2016, the comprehensive climate comfort index was calculated based on the temperature humidity index (THI), wind-cold index (WCI) and holiday climate index (HCI).The comfort index was calculated, and the comfort period was defined, and its distribution law was analyzed, then, based on the remote sensing and environmental data in Lichuan for recent 5 years, the air quality rate and remote sensing ecological index (RSEI)were calculated, and the ecoenvironmental quality was analyzed. The results indicate that:1) The comfort period in Lichuan city is between April and October. The number of comprehensive comfort days are 153 days, accounting for 42% of the total days per year.The comfort days has increased significantly during the last 60 years, and the discomfort days sre decreasing. 2) in recent 5 years, the air and water environment in Lichuan has been excellent, and the ecological environment quality has been maintained steadily and steadily. 3) Compared with the main tourist cities, the regional meteorological disasters and the ecoenvironmental quality analysis show that the climate suitability is superior for Lichuan ecotourism. 4) The latitude boundary of above mentioned comprehensive comfort period is 25°N, and decreases with latitude in north. The comfortable days decreases with latitude. 5) The comprehensive comfort period has a tendency to postpone with increase of altitude, the altitude boundary of the comfort days is 2500 meters, and increases with the increase of altitude below 2500 meters, and obviously reduced with altitude above 2500 meters. 6) The comprehensive comfort period around 30°N is basically 4-10 months, and the comfortable days are about 150 days.