Ground collapse is one of the major types of geological disasters.The Information-value model and GIS are used for the risk evaluation of ground collapse in main urban area of Guangzhou city.7 evaluation indices are conceived through choosing factors such as fault

stability of the earth’s crust

thickness of quaternary sedimentary

bedrock lithology

groundwater dynamics conditions

surface and underground intensity of human activities.ArcGIS software is applied involving data collection

data management

data analysis and evaluation express.Finally

the danger classification chart of grade about ground collapse in Guangzhou is produced.The results of study show that there are five danger grades in main urban area

the most dangerous zone lies in the south of Guang-hua basin

the secondly most dangerous zone lies in the west-north of main urban

in Guangcong fault or in the intersection of subway

and the marginally stable zone is located in the center of main urban area.