Abstract: It is introduced that the GIS system structure and the characteristics of component-based GIS. The component-based GIS is one of the most main directions of GIS in recent years. The information management system of kaolinitic rocks in coal measures of China is integrated with MapX in the environment of Visual Basic6.0. The system has achieved many functions including managing attribute database and spatial database, quickly inquiring and orientation between attribute data and spatial data, theme romancing, eagle-eye map browsing and so on. The analytic hierarchy process and the fuzzy comprehensive evaluation are integrated to estimate the quality of the kaolinitic rocks in China coal measures.