As people make efforts on accident prevention, the number of accidents is decreasing, fatal major industry accidents are rather than increasing so that the number of deaths has not decreased. Under these conditions, there is an attempt to introduce and perform the safety vacational education system as a means for keeping from major industry accidents. Therefore, in this paper, we analysis vacational education of manufacturing industry in safety point of view and suggest the technique efficiently measuring and managing each safety management. Proposed the technique shows that the specification on safety determines weight through the managers of firms and each process is suggested by using SN Ratio.