After a comprehensive review on the exploitation of information technology in geotechnical engineering and underground engineering, a concept of digital underground space and engineering (DUSE) is proposed. Research results show that DUSE is an innovative new information platform for the life cycle of underground space and engineering. DUSE is also a digital museum of the underground space and engineering. By employing the concept, the method and the techniques provided in DUSE, a more realistic and transparent underground space and engineering could be built; huge amount of data could be easily managed and effectively visualized. Therefore, useful information of these data can be processed, improving working efficiency and promoting the implementation of intelligent decision about the engineering project. In addition, some research topics that need to be further addressed are also discussed.