We designed a new type fiber Bragg grating (FBG) tilt sensor. It can be used to detect the magnitude as well as the direction of a twodimensional inclination by using four FBGs, the temperature effect has been eliminated completely without additional temperature compensation schemes. The experimental results show that this sensor has high angle sensitivity and measurement resolution and the tilt angle accuracy and resolution of the FBG tilt sensor are very good. Resolution of about 0.009° has been achieved. Furthermore, the accuracy and resolution of the FBG tilt sensor can be easily increased by either using a heavier hanging weight, or decreasing the angle between a pair of hanging fibers. Furthermore, if the size of the designed structure is further decreased, the error caused by temperature difference of four FBGs due to air disturbance can be eliminated. It can reduce the environment temperature effect on metrical result.