Dwing to the complexity of internal wiring and the inflammability as a result of bad ventilation and heat dissipation, the temperature of the power cabin of integrated pipe gallery needs to be monitored.In this paper, a temperature monitoring arrangement method through magneto-thermal coupling analysis is proposed.By using the finite element method, a two-dimensional model is established on the basis of actual model project of power cabin.After multi-physics coupling numerical calculation, a temperature nephogram is figured out.Then, by setting multiple temperature observation lines at high temperature area, reading the value and fitting into curve, the highest temperature spots can be excavated.Thus, the most inflammable spot can be discovered and the fire hazard can be wiped out effectively by deploying the temperature monitoring in the places.