The project aims to study the state perception methods for physical quantities such as temperature and humidity, crack (joint) opening degree, deformation amount, and leakage volume in the specific service environment of urban subway tunnels. It investigates the implementation method of micro-electromechanical systems (MEMS) intelligent terminals, and through theoretical research, model experiments, and wireless sensor development, a wireless intelligent sensing system suitable for subway tunnel structural safety has been developed. The intelligent sensing terminal composed of wireless inclination sensors, wireless water leakage sensors, and wireless crack (joint) sensors realizes wireless sensing of subway tunnel structural deformation, water leakage, and cracks (joints). By sensing key information in the subway traffic environment, the safety status of the tunnel structure is evaluated.