The paper summarizes recent progress in the observation, mechanism and model of landatmosphere interaction, and pointed out that the existing observational studies have not taken into account the effects of both the changes of terrestrial ecophysiology and atmospheric boundary layer on land-atmosphere fluxes. As a result, they restrict the parameterization of land surface process, parameter inversion from satellite remote sensing, and the operational application of land surface process model. In order to realize comprehensive understanding of land-atmosphere interaction and the development of land surface process models, it is pointed out that the studies on the effects of changes in terrestrial ecophysiology and atmospheric boundary layer on landatmosphere interactions and the operational application of land-surface process models are needed to be emphasized in the future, the main tasks to be concerned include: (1) three-dimensional observation of the landatmosphere interaction across the boundary layer, (2) application of multi-source data in the land-atmosphere interaction across the boundary layer, (3) development and operational application of land surface process model.