It is questioned that countermeasures can prevent or decrease accidents, if one classify or cut apart causes of electrocution accidents, neglect the interaction among these causes, and ignore the external factors of the causes. Traditionally, one uses measures of engineering, education, and enforcement to preventing accidents, but the problem of industrial safety is a divergent problem, any answer you have is at best an approximation. The writer use System Theory to inspect electrocution causes and their prevention measures