Abstract: Land-atmosphere flux exchange observation is the foundation of land surface process research, and also the basic content of ecology, hydrology and atmospheric numerical models.A brief introduction is offered concerning the research status of land-atmosphere flux exchange as well as the relationship between flux observation and global change, modelling, and land surface process model.The construction of land-atmosphere flux observation stations in China, especially in Northeast China is analyzed, and the content, significance and existing problems of land air flux observation in the ecological and agrometeorological scientific field bases of China Meteorological Administration in Northeast China is investigated.In addition, the future development of flux observation is proposed.