Human interventions in natural systems have resulted in large change in vegetation composition and distribution pattern. The Land Use Change and Climate Change （LUCC） study under the International Geosphere Biosphere Program（IGBP） is a major initiative in this regard. Grassland change plays an important role in global change. This paper dynamically monitors status of grassland change in China from 1980s to 2000 based on RS & GIS. The data are extracted from LANDSAT TM image. From these data

the type of land use is decided on basis of the interactive MGE environment. To diminish the geometric error of the image

we adopt the processing method of Least-Square. As for pixel sampling method

we adopt the method of Nearest Neighbour Interpolation or Bilinear Interpolation. After the image processing

the maximum geometric errors are 2-3 pixels. The task of image classification is mainly taken by experts with the help of relief map

navigation photo etc

thus landuse coverage could be acquired. In the study

following conclusions can be drawn:（1）There is obviously zone difference of grassland dynamic change in China. From grassland being changed to farmland

mainly occurs in Heilongjiang province

Jilin province

Liaoning province and east Inner Mongolia. From the grassland being turned to urban

affects the relationship with regional population

economic development. From the grassland being changed to forest

mainly concentrates in southeast littoral; Grassland degradation is mainly distributed in Inner Mongolia

Xinjiang

and Qinghai. Grassland change bears on natural condition

but human activities have heavily impact on it. Grassland degradation has adverse impact on environment

especially north China and it will restrict regional economic development.（2）As for the grassland’s change

there are many phenomena of farmlands occupy grasslands. The farmlands occupation of grasslands plays a leading role in the change. The occupation by farmlands is more serious in arid and semi-arid regions. The grassland’s occupation by farmland at different levels for all coverage levels of grassland is mainly located in the non-monsoon zones.（3）The main reason of the grassland area decrease and coverage level reduction is that the resources’ functions are continually greatly wrested under the push of human demand for economy and the dictate of benefit. This is also the contradiction between the development and ecologic administration which are faced by the west regions of our country.