Jeong used the induction brazing method to seal the instrumentation feedthrough under the Ar gas environment [7]. On the other hands, the brazing method has disadvantages that it is consisted of complicated devices and the brazing temperature should be accurately controlled. The brazing temperature control performance is one of the important parameters in induction brazing process. In this paper, an accurate temperature control scheme of induction brazing coil is studied. The temperature control performance by the proposed control scheme is evaluated through the experiments