Global Change is a result of interactions and feedbacks among the Earth’s componentsr core and mantle

lithosphere

hydrosphere

atmosphere and biosphere. It includes long-term evolution of the Earth on timescales of thousands to millions of years

and short-term changes of atmosphere and ocean. As the focus of global study

the global environmental change on timescales of decades to centuries is particularly relevant to human activity. It involves processes of the physical climate system and the biogeochemical cycles. The former concerns the atmospheric and oceanic processes that govern the distributions of temperature and rainfall over the surface of Earth. The later is related to the movements of key elements essential to life （C

N

P

S） in the Earth system. These two subsystems are most relevant

and be affected by human activity. Advanced remote sensing techniques provide necessary means for global study. They can ensure the global observations from space and from earth’s surface

and provide the analysis and interpretation capability to tnese observations

and the developmental ability to integrated information system. Based on that

we are able to establish earth system conceptual model

predict global environmental change trends. In this paper

the international global change programs and China’s global study on remote sensing are briefly introduced.