The present study has been performed for analyzing the fluid flow and heat transfer of PMSM electric motor with considering shape design variables. In order to analyze the flow and heat transfer, the developed CFD program has been used. It had been developed for inexperienced motor designer of CFD analysis. So mesh can be easily generated from the shape design variables only. The conjugate heat transfer between a flow passage of the motor and inner parts consisting of rotor and stator has been regarded and cyclic boundary condition has been applied to reduce the computational time and memory storage. MRF(Multi-Reference Frame) method has been used to consider rotating operation of the rotor and heat source has been applied to the coil and stator parts in the motor. For considering the turbulence effects, the Standard k-ε turbulence model is used. The numerical simulation results show a good agreement with the commercial program. The parametric studies such as the speed of rotor, shape design variables, and material properties, had been carried out for the analysis of thermal characteristics of PMSM motor.