Abstract: Transect research in the condition of global change is being a focus of IGBP in recent years.On the basis of transect theories,the region from latitude 25°N to latitude 35°N along the Yangtze Valley was firstly defined as West-East Transect of Southern China(WETSC)and the construction and layout pattern of forest ecosystem research station in the area of WESTC was put forward in this paper.Based on the foreign advanced theories of from station to site in the long-term ecosystem research,the small transect as following Jiulianshan-Jinggangshan-Dagangshan-Lushan from transitional region of south subtropical zone and mid-subtropical zone along Ganjiang river valley in Jiangxi Province would be set up.Then the small transect foundation of Mts.Altay-the Ergis River-the Junggar Basin-Tianshan Mountains from North to South in Xinjiang Uygur Autonomous Region was discussed.At last,on the basis of forest ecosystem services,the triangle transect of Guangzhou-Panyu-Zhongshan-Zhuhai-Macao and Guangzhou-Dongguan-Shenzhen-Hong Kong in the Pearl River Delta in Guangdong Province was illustrated.