Topographic pattern has important impacts on atmospheric circulation and re- gional climate. The special terrain of Longitudinal Range-Gorge Region （LRGR） in South- west China has a ＂corridor-barrier＂ effect on monsoons circulation, which led to the redis- tribution of surface hydrothermal pattern and is the main driving force of the formation and evolution of the ecosystems. Previous studies showed that LRGR was influenced by the combined effect of the Indian monsoon and the Pacific monsoon, which meet at the Ailaos- han mountain ranges. The Ailao Mountains are an important geographical dividing line. In this study, based on proofs of the atmospheric circulation, moisture transport, regional climate, runoff, and plant stable oxygen isotopes compostion, we found that LRGR is af- fected mainly by the Indian monsoon. The Pacific monsoon only affect this area in August, and the influence is not significant. Under the terrain ＂corridor-barrier＂ effect, surface water vapor, precipitation and runoff in LRGR showed significant zonal differences and meridional extension; crowd circulation, moisture transport, regional climate and river . , . runoff. The atmospheric precipitable water, precipitation and stream flow present an ap- parently different pattern between the west and east sides of Ailao Mountains. The envi- ronmental differences are the results of the hydrothermal redistribution by the special ter- rain, which are the ＂barrier＂ and ＂corridor＂ effects of the LRGR. These differences are not the results of geographical zonality, but the results of non-zonality. The ＂corridor-bar- rier＂ effects of the tongitudial the geographical elements and range-gorge on monsoons result in the spatial differences of the associated ecological effects.