PURPOSE: To work a variety of playing boards in a common line by specifying the kind of the playing board to be worked, by reading out a discriminating body for specifying the kind of the playing board and drive-controlling the working means by the operation program corresponding to the kind of the playing board.

CONSTITUTION: Plural kinds of working means 11 for applying the working processing on a plate-shaped member transferred along the production line of a playing board is provided, and a product is finished through a process for attaching a decoration plate on the surface of the plate shaped member, process for cutting the plate shaped member to a desired shape, process for striking nails, and a process for installing a windmill, winning device, etc. In this case, plural kinds of operation programs corresponding to the kinds of the playing boards is memorized in the ROM 103 in a drive controller 10. Further, on each playing board, a bar code 3 for specifying the kind 15 attached, and this bar code 3 is read out by bar code reader 9, and the pertinent operation program is read out from the ROM 103 by a CPU 102 on the basis of the read- out information, and each working means 11 is controlled according to the operation program.