The DK46+092-DK53+300 sections of the Jingxiong intercity railway airport tunnel are located in the area with obvious land subsidence. In order to understand the safety situation of the tunnel during construction and later operation in a more rapid and intuitive way, it is necessary to monitor the health status of the tunnel structure. In this paper, based on the fiber grating sensing principle, the circumferential strain sensing of the tunnel, the relative displacement sensing of the deformation joint, and the layered settlement monitoring around the tunnel are carried out. The layout and installation processes of the sensor elements are introduced in detail, and the automatic and remote control of the health monitoring of the large-section tunnel structure is realized. The initial monitoring results show the changes of the strain, axial force, and bending moment of the tunnel during the concrete pouring and curing period and backfilling period. The automation and long-term monitoring of fiber Bragg grating are beneficial to the real-time monitoring and early warning of the tunnel structure.