With the High-speed development of national economy, building new aerodromes and rebuilding old aerodromes have become an important way to develop economy in west area of china. In the region of Qinghai-Tibet Platean, by which technology to choose address, assess the region's engineering geology and eco-environment etc will be the most important thing in prophase. It will effect aerodrome-building and outlay directly. Based on engineering geology reconnaissance of Ali of Tibet, Kangding of Sichuan, Tengchong of Yunnan, Xiaoshao of Kunming etc, we discussed “3S” technology function and key technology applying to altiplano aerodrome construction, bring forward altiplano aerodrome construction project geology reconnaissance key method based on “3S” technology is, this new way contribute to the success of altiplano aerodrome construction and modern management. In the period of aerodrome construction project geology reconnaissance, high-resolution ortho-map of working area, 3D Remote Sensing Virtual Reality and animation of planned aerodromes are made with the technologies of Remote Sensing digital image process, Virtual Reality and digital photogrammetry. By information extracting and comprehensively assessing on the geognosy, engineering geology, environment geology and eco-environment of work area, scientific foundation can be offered to deciders and workers of aerodrome.