Foundation pit engineering supervision method and system based on digital underground space

According to the foundation pit engineering supervision method and system based on the digital underground space, real-time data of a CIM basic platform and data of a monitoring control value database are output after being compared and analyzed, and when dynamic monitoring module data in an area monitored by the CIM basic platform exceed a monitoring control value in the data of the monitoring control value database, the data of the dynamic monitoring module are output; when the data exceeds the monitoring control value in the monitoring control value database, an alarm signal is output to the early warning and alarm processing platform, the same point location, the alarm item and the early warning level in the monitoring area give an alarm again, early warning is carried out after the danger level is upgraded, and the alarm processing platform outputs the alarm signal to the short message alarm platform to give an alarm; and the analysis signal is output to the trend qualitative analysis platform, and the t