The safety measures greeted time of the further innovation, too. The loss (human life, damage expense) by labor accident of our country has been largely reduced after approximately 40 years from a peak, but great disaster becomes the big social problem with ceasing to fall in the late years. Technical tradition by the retirement of the lump of earth generation becomes insufficient, and the deterioration of facilities becomes the problem again in terms of human resource, too. On the other hand, it is apparent even if it watches a recent example that the company which neglected security bears a vast loss. The company carries out genuine "safety measures", and it is necessary to lay emphasis on the making of person who can notice danger. In addition, I consider the figure which there should be of the security while watching problems and the measures of the recent accident example based on being the basic factor that security increases by profit.