Abstract: Based on the detailed data and information, this article studied the climate profile, sunshine, relative humidity, precipitation, temperature, wind in Ya'an systematically.The main results are as follows:1) there are excellent living environment and ecotourism climate resource in Ya'an City;2) the northern part of Ya'an City is of the highest stratiform cloud regions in global, the "parasol effect" is significant;3) Ya'an City is a most moist city In the world, the temperature and humidity is very pleasant in its central part;4) Ya'an City is a famous "Rain City" in the world, the average annual rainy days are up to 188.4~231.8 days, an annual average rate of night rain is up to 71%~78%;5) the three-dimensional climate characteristics is very significant in Ya'an.Compared with the other cities in the east of Tibetan Plateau along the east slope of 30 °, it is the most warmest city in winter and the coolest city in summer, the average summer temperature is 23℃ or so, it is suitable for recuperating;6) the average wind speed is 0.5~1.8 m·s^-1 all the year all.