Abstract: The theory of ecosystem services can be used to quantify the economic valuation of services supplied by ecosystems．The actions of ecosystem services valuation in land use are stated．with adduced and amended figures，the ecological consequence of land use from l990 tO 2000 in Yijinhuoluo，a county of Inner Mogolia is assessed．The results show that the ecosystem services have diminished 226．96 million Yuan in the ten years．This demonstrates that it induces prodigious result on regional ecological environment of increasing economy.