The system of the device is installed on the vehicle-mounted central control computer. The system integrates a small detection device and places it in a seat belt. It is connected to the vehicle-mounted central control computer through a Bluetooth module. The health detection module in the device collects the driver's physical health information and transmits it to the vehicle-mounted display screen to realize real-time monitoring of the owner's heart rate, blood oxygen, body temperature and other physical indicators; and can record and analyze health data, identify health risks to ensure the safety of passengers during the epidemic; use the hazard alarm module to collect and process information such as speed and lane deviation during driving, and when the vehicle encounters an accident during driving, it will automatically send information to the nearest hospital, traffic police, etc. through the mobile phone terminal to ensure that the personnel in the vehicle will be rescued at the first time; the fatigue driving warning module is used to collect information such as heart rate variability (HRV) and surface electromyography (SEMG), and the changes of human ECG and electromyography stages are analyzed by the designed algorithm to evaluate and warn whether the driver is in fatigue driving. The device is designed based on advanced mobile Internet of Things and wearable design concepts. The device combines advanced technologies such as smart phone APP, cloud platform and professional map reading and analysis software, so that the device terminal can realize functions such as driver health detection, driving accident safety alarm, fatigue driving wake-up, etc., and ensure the driving safety of passengers.