Abstract:Land subsidence in urban area is one of the ten most serious geologic hazards. Based on the study of history and current situation of land subsidence, combining with the construction of the bedrock benchmark of land subsidence and the study of land subsidence monitoring and warning, land subsidence monitoring system of urban area in Jining cit has been built by using GIS, database, measurement and communication technologies. Through automatic receiving of the monitoring data, data processing and diagnosis/analysis, report generation and the design of the monitoring module, real time monitoring of land subsidence can be realized. It will not only provide basic data for the study of land subsidence, but also provide technical fundament for making advanced decision and prevention coutermeasures for the government.