The relationship between economic development and environment and the evolution characteristics of spatial pattern in Hexi Corridor of Northwest China were analyzed based on Landsat TM images in 1985,1995,2000 and 2011 with twenty counties in Hexi Corridor chosen as the basic research units. The ecological economic harmony during 1985- 2011 was estimated according to ESV( ecosystem services value) and EEH( ecological and economic harmony) index with the ecosystem services value estimation methods. The resul...