Abstract
It is a common knowledge for safety engineers to perform machine safe measures based on the risk reduction process described in ISO12100. However, as there are many "hazardous point near by operation" or the work in large scale industrial field, it is very difficult to apply above safe measures. The supporting system for safe work of operator using the database related to risk information, communication system using personal type information terminal, or discrimination or warning system was proposed. It was also indicated that these systems were effective in order to reduce the fatal accident in industrial field.
