Abstract: Based on the satellite remote sensing data acquired in 1975 and 2006, and by using the assessment method of ecosystem service value, the dynamic changes of physical production value, gas regulation value, and water storage value of Ruoergai Plateau wetland ecosystem in 1975〖KG-*2〗-〖KG-*7〗2006 were studied. During study period, the total value of the three services decreased from 1959 billion RMB Yuan to 1238 billion Yuan RMB, among which, physical production value increased by 0302 billion RMB Yuan, while the gas regulation and water storage value decreased by 7507 billion RMB Yuan. The benefit from the increase of physical production was much less than the loss of ecosystem degradation. Overgrazing induced the biomass reduction and soil deterioration, resulting in the decline of Ruoergai Plateau wetland ecosystem service value and service capacity.

Key words: simulated satellite channel, vegetation index, wheat, nitrogen index, quantitative monitoring equation.