文中通过分析城市地下空间开发利用过程中引起地表沉陷的诱发因子,结合我国城市地下空间利用特点,运用“3S”技术对城市地表空间数据的变化进行实时计算分析,对已发生的变形能及时准确地反映出来而且还能对将要发生的变形及趋势进行预测、预报,及时消除危及环境安全的隐患,避免事故的发生。 In this paper, by analyzing the inducing factors of surface subsidence induced by the development and utilization of urban underground space and combining with the characteristics of urban underground space utilization in China, the “3S” technology is used to calculate and analyze the change of urban surface space data in real time. Timely and accurately reflected but also the deformation and trends that will occur are predicted, forecast, timely removal of hidden dangers endangering the environment and avoid accidents.