To precisely grasp a worker under radiation control and improve the precision of working dose management by receiving the signal corresponding to a work name transmitted from a work number transmitter by a personal dose equivalent measuring instrument, and collecting the data every work name.

To a work number transmitter 6 installed in the entrance of a working place such as nuclear power station, the work number corresponding to a work executed there is inputted from a number input part 1, and transmitted to a memory part 3. The memory part 3 selects the work name corresponding to the number inputted 1, and displays 5 it. The inputted 1 work number is displayed on a number display part 2, and the transmission instruction of the signal corresponding to the number is also transmitted to a transmitting part 4. When a worker wearing a personal dose equivalent measuring instrument 11 pushes on a switch 10 when he enters the working place, the transmitted 4 number is received 15 by the measuring instrument 11, and the work number is surely stored in the measuring instrument 11 of a person engaged in the work, so that the person engaged in the work can surely grasp the work number, and the management precision of working dose can be improved.