Abstract: This paper constructed the Land Use Changes Tupu During the Period of 1990-2001 in urban and suburban area of Taiyuan city taking advantage of the theory of geographic informatic Tupu supported by RS and GIS. Based on the research of Land Use Changes Tupu, the character of land use change in research area was analyzed and the ecological effects was calculated between 1990 and 2001. The result show that the area of farmland、rangeland and water bodies decreased from 1990 to 2001, the increased areas of farmland were the most, while the area of garden plot、unused land、forest land and structure land increased, of which, the decreased area of forest land were the least. The change of Land Use result in the ecosystem service value of Taiyuan increased from 1202.15×106 yuan in 1990 to 1251.49×106 yuan in 2001,the average increase rate was 0.37％.The most Land Use changes category was the transformation from farmland to unused land, the transformation from farmland to structure land was the next. The degeneration of rangeland、farmland and the increase of unused land brought certain negative affection. By the empirical analysis, the way of geographic Tupu was a very effective meaning in analyzing land use change and ecological effects.