Abstract: With the expansion of engineering investigation fields and scale in China, data of investigation become more and more large and complex. How to use computer technology in particular GIS technology to effectively organize and manage survey data has become a hot and difficult point in investigation techniques. The traditional two-dimensional GIS technology is difficult to describe underground complex geological environment. Three-dimensional GIS technology can be used to solve this problem.In the paper based on the analysis of three-dimensional GIS technology features and the industry's needs on engineering investigations the application of three-dimensional GIS on engineering investigation was discussed. As well as the three-dimensional supporting information system built by authors was introduced. And the system was tested fully with an example. A comprehensive inspection was conducted.