In the past 10-20 years, the peripheral areas of Beijing have suffered increasingly serious

environmental degradation, because especially of the excessive exploitation of resources caused by land use and

the land cover change. The change of such land use types as cultivated land, grade plot, forest land, grassland,

construction land, water area and saline alkali land, and wetlands directly impacts the environmental situations

of these areas. With remote sensing technology, geographic information system technology, and global positioning

system technology as the means, the two phases of remote sensing images in 1991 or 1992, 2001 or 2002 as the

basis, and the current land use map and other related materials such as ecological construction as the

supplementary materials, the authors, through field investigation and inspection, accurately obtained the land-use

status of over 230000 km2 land area all over the 51 county areas around Beijing and the land use dynamic changes

as well as land degradation in the past 10 years associated with ecological environment and ecological

construction, which reflects the effect of ecological construction.  The data obtained provide scientific basis

for the reasonable utilization of resources and the construction and planning of the ecological environment.