The paper presents a real-time monitoring system for underground miners' status, leveraging IoT technology to enhance safety and health monitoring. The system integrates two wearable terminals: an electronic bracelet for collecting vital signs and a miner lamp for multi-gas detection, personnel positioning, and wireless communication. The bracelet uses Bluetooth to transmit data to the lamp, which is equipped with gas sensors and a positioning tag. The 5G and UWB base stations ensure reliable communication and positioning, with distributed MIMO networking minimizing latency. A backpropagation neural network model estimates miners' fatigue levels based on vital signs and saliva pH. A unified visualization platform manages all miner states and facilitates emergency response. The system has been operational in a coal mine for over six months, demonstrating its effectiveness in monitoring miner health and safety. Future plans include expanding the system to other mines and enhancing data security with blockchain technology.The paper presents a real-time monitoring system for underground miners' status, leveraging IoT technology to enhance safety and health monitoring. The system integrates two wearable terminals: an electronic bracelet for collecting vital signs and a miner lamp for multi-gas detection, personnel positioning, and wireless communication. The bracelet uses Bluetooth to transmit data to the lamp, which is equipped with gas sensors and a positioning tag. The 5G and UWB base stations ensure reliable communication and positioning, with distributed MIMO networking minimizing latency. A backpropagation neural network model estimates miners' fatigue levels based on vital signs and saliva pH. A unified visualization platform manages all miner states and facilitates emergency response. The system has been operational in a coal mine for over six months, demonstrating its effectiveness in monitoring miner health and safety. Future plans include expanding the system to other mines and enhancing data security with blockchain technology.