Gas and dust explosions are the most serious accidents in the process of coal mining. GMH-Gas Monitoring Helmet is a new helmet that can predict gas and dust explosion accidents. The helmet is equipped with a gas detection sensor module, which can measure the gas in the mine in real time. Air flow, when the gas concentration reaches the warning value, the warning light flashes and is accompanied by a vibration prompt, reminding staff to grasp the best escape time to avoid large-scale casualties.