It was the much more variation through the development of technology of housing construction and the change of life cycle of occupation and it is the same to construct the apartment. In early age to adopt the apartment, the rahmen method was main course but the RC bearing wall method is the main course nowhere. However, the RC bearing wall method was the course to increase a wet method and to increase a wet method was a longer a construction duration & input an abundant labor and it is the actual condition to drop a qualification for increasing the unit cost of construction & oncoming age of a skilled worker & a skill falling. So, it is going to be higher the demanding of dry wall method to be changeable throughout being the higher of social demanding on the long-life housing of demanding recently. Therefore, in this study, it would compare & analyze the productivity of lightweight concrete dry wall method (LDWM) and the RC bearing wall method (BWM).