Though steel stud house offers many advantages to the consumer and the builder, the use of steel studs in dry wall system causes thermal problems such as heat bridge or pattern staying on walls. The purpose of this study is to measure thermal performance of dry wall which uses steel stud transformed one by using measurement equipment to decrease heat bridge of steel stud and ensure heat performance. As results of test and photographing by using TVS, there was temperature gap of each stud and surface temperature of each section appeared differently due to shape of stud which delays thermal bridge. As a comparative performance test result, the performance of dry wall which uses steel stud transformed one has been improved compare with the dry wall using general steel stud.