Abstract: Automatic monitoring system is one of the main means to ensure the safety of underground engineering construction. This paper discusses the current international research and application status of underground engineering monitoring system from three aspects of data acquisition, data transmission and data processing, and emphatically introduces the mainstream new technology of monitoring system. Based on our previous research results and the development trend of underground engineering monitoring technology, this paper puts forward specific and implementable technical routes in view of the challenges faced by future monitoring, including: high-precision real-time perception of key safety state indicators, real-time transmission of monitoring data, multi-source data fusion, and the visual intelligent early warning platform. Key words: underground engineering; automatic monitoring; safety status; review

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