In order to examine disparity and similarity of landuse types in karst rocky desertification area under different environmental conditions, a quantitative research on basin, mountain and gorge was made with support by 3S technology, using SPOT images(2.5 m resolution) in 2008. Results are as follows: (1) Rocky desertification would occur potentially in dryland, shrubland, sparse woodland, natural grassland, wild grassland and bared rocky area. In detail, shrubland would degrade into the moderate rocky desertification area; sparse woodland, natural grassland and wild grassland would degrade into the serious rocky desertification area or below; inferior ranks to it dryland would potentially degrade into any type of rocky desertification; and 100% bared rocky area would degrade into the serious rocky desertification area or worse. (2) There were different rocky desertification rates and strengths in the same landuse type under different environmental conditions. (3) Generally, the geomorphologic types, in order of decreasing rocky desertification rate, were gorge, basin and mountain. (4) Rocky desertification process in gorge and basin areas showes intensity increase, and the process possibly would also showes phenomenon as enlarge the area and increase intensity of rocky desertification in karst mountainous environment.