1. A worker safety management system for managing safety of a worker in a work place including a designated work area that includes therein a work machine that could be a source of danger, comprising: an ID tag carried by each worker and containing safety management information on the worker; one or more ID tag readers placed in a suitable part of the work place to read safety management information on each worker from the ID tag carried by the corresponding worker; and a safety management control unit for executing a control on safety management of each worker according to the safety management information read from the corresponding ID tag by using the one or more ID tag readers; wherein the safety management information stored in each ID tag includes a work area code indicating a work area permitted to the corresponding worker and a danger avoiding capability code indicating a danger avoiding capability of the worker, the danger avoiding capability indicated by the danger avoiding capability code being determined from a worker skill of the corresponding worker that is evaluated in a standardized manner from past work experience of the corresponding worker and credits earned in a safety education program, and a specific degree of danger in the work area permitted to the worker.