PROBLEM TO BE SOLVED: To provide a board work system capable of suppressing increase in the workload of a user, even if recognition of the position recognition mark of a board is bad in a board work device in the upstream.SOLUTION: A board work system 100 includes a plurality of board work devices each including a printer 3, a component supply device 4, and an inspection device 6. When a fiducial mark F of a board P in an image captured by a board recognition camera 442 is recognized based on the user's teaching in the board work device on the upstream side, the fiducial mark F is recognized using the teaching information of the fiducial mark F of the board P recognized based on the user's teaching in the board work device on the upstream side, in the board work device on the downstream side.SELECTED DRAWING: Figure 3
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