Abstract: Remote sensing technology is now efficiently used in urban geological survey. It may provide more macroscopic and intuitive data support for urban geological mapping and specific investigations of some geological problems. In the Project on Urban Geological Survey of Qingdao City, the method of remote sensing is widely used and has achieved a lot. Firstly, based on the multi-period high accuracy remote sensing images, the remote sensing interpretation marks for Jiaozhou Bay are established and the regional geological map of Jiaozhou Bay recompiled. Secondly, the distribution of artificial reclaimed land around Jiaozhou Bay is identified. And the third, a preliminary estimation of underground space resources is made available with remote sensing data for the depth of 0~10 m, 10~30 m, 30~50 m and 50~100 m respectively of the main urban area of Qingdao city. It is proposed that 10~50 m underground is the potential layer for expansion of underground space. Our practice demonstrates that the results are very useful to realize the purpose of geological survey, to improve the work efficiency, and to ensure the integrity and accuracy of results. The remote sensing technology may also provide references for solving of some specific urban geological problems.