According to the construction enviromental changes due to the trend of large scale and complicated building construction, many construction methods(such as : TOPDOWN)are more often used. However, it is pointed out that occupational pulmonary diseases, reduction of the machinary lifetime and productivity caused to be narrow visual field and collision between the workers. Therefore, this study is mainly dealing with the views of productivity and safety improvement in order to improve work efficiency and to insure the safety in underground construction environment.