Compared with the convention inclinometer, the inclinemeasurement technology based on FBG can realize automatic realtime monitoring. Firstly, the inclinometer based on FBG is introduced. Then the deflection value of the measuring point is calculated according to the strain measured by FBG through the theoretical model and the difference algorithm, and compared with the measured deflection value in the dial indicator. The feasibility of inclinemeasurement technology based on FBG is verified by experiment, and the strain transfer rate of FBG bonded on the surface of the inclined tube fabricated by three kinds of materials is calibrated. The experimental results show that the strain transfer rate of PVC tube is 95%. Since the price PVC tube is relatively low, it is more suitable for engineering applications.