Abstract: According to the monitoring requirements of building modern large-scale monolayer workshop and greenhouse in the mining subsidence area，the detection scheme based on CAN technology is adopted to realize the design of intelligent node，through the MCU system to complete settlement data collection.At the same time，the real-time and reliable data transmission is realized by the technology of CAN bus.Then the data is directly transmitted to the computer for data analysis and processing.The monitoring and management software based on VB is used to query and display real-time temperature.Monitoring test data in Fenghuang flower greenhouse of Tangshan Majiagou mining area shows that the area is subsided obviously.Sedimentation value reached dozens of millimeter in 7 months，and the maximum dedimentation value can reach 83mm.The system changes the traditional detection method of distributed control system，saves manpower and material resources，and realizes real-time and reliable detection.

Key words: CAN bus, Mining subsidence area, Subsidence monitoring, Visual Basic