For the property of macroscopic view, real time, high efficiency and low cost, remote Sensing technology has the superiority in the great west-development, especially in solving geological engineering problems at the beginning of big foundational construction. By image interpretation, field investigation and comprehensive analysis, people can find bad geological condition and special geological phenomena, then evaluate engineering geo-
logical condition and predict potential faults, and finally, bring forward more reasonable suggestion for engineering, select site and route, deliver reliable instruction and guidance for the design department.
Since 1980' ,The Remote Sensing Application Institute of ARSC had finished over 40 engineering projects,such as‘site selection through Wanjiazhai, a part of channel for getting water from yellow river to serve Tianjing,`site selection of water power plant over Yalongjiang river in Jinping, Sichuan',`Geological engineering evaluation about the site for the second Bridge across the Yangtz river in Nangjing',‘site selection for national highway of No.31(within Xinjfang),218,317,210,108(within Sichuan),312 ( within Shaanxi and Sichuan),212( within Sichuan and Chongqing), main line of national highway GZ25 from Dandong to lasa ( within Gansu and Qinghai),320 (within Yunnan and Guizhou),309(within Ningxia),the great west highway from Yinchuan to W uwei'.The paper concluded the technical requirement, methodology and the feature of using remote sens-
ing technology to solve engineering problems according to the experience in these years, and made a application prospect for remote sensing in the area.