For the fiber-optic gyroscope( FOG) was easily influenced by the ambient temperature resulting Shupe bias,the thermoelectric analogy method was applied to do the thermal analysis of different structural fiber optic ring( FOR) modules. The principle that the parallel heat capacity and series resistance were the key factor on the FOG thermal performance was proposed by comparing the corresponding circuit model. The parallel heat capacity and series resistance affecting the FOG temperature qualitatively was an...