The changes of external factors such as temperature and strain can cause the center wavelength drift of fiber Bragg grating (FBG) reflection wave. Strain cannot be directly measured according to the center wavelength drift in strain sensing measurement. The problem of temperature and strain cross sensitivity seriously restricts the measurement precision and the application of FBG sensor, which hinders the sensing monitoring technology to be practical. Many researchers have proposed various solutions to eliminate the influence of temperature according to different algorithms, materials, packaging structures, and so on. According to the different methods of temperature processing, the solutions can be divided into temperature separation method and temperature compensation method. The advantage and disadvantage of each method are analyzed.