In this paper,NDSTI and improved NDBI were derived from TM/ETM+ images of? Chongqing’inner district in 2002 and 2007.The results can better reveal the correlation laws of? spatial distribution among NDBI,NDSTI and the UHI effect level of construction land.There? was significantly stronger and wide range of UHI effect in the inner district of Chongqing in? 2002.With the expansion of urbanization,strong UHI downgraded and disappeared in the? old city,and appeared,strong upgraded in new city in 2007.Yangtze River,Jiangling River,? lakes and mountain vegetation belongs to cold island area,playing in a role in separating and? adjusting the UHI effect.