The present invention has as its object the provision of a battery material stacking system able to stack sheet-shaped workpieces relating to battery materials continuously at a high speed. The system is comprised of a conveyance mechanism 1 conveying sheet-shaped workpieces W relating to battery materials in a predetermined direction, a placement mechanism 2 placing workpieces W, and a stacking mechanism 3 stacking workpieces W. The placement mechanism 2 comprises a stator 21 of a linear motor having a predetermined running rail, a plurality of movers 22 of a linear motor provided at the stator 21, pickup members 23 provided at the movers 22 and picking up the workpieces W, and a control part 100 controlling running of the movers 22 at the stator 21. The pickup members 23 pick up the workpieces W conveyed from the conveyance mechanism 1 and rotationally convey the workpieces W along with the movers 22 running along the running rail of the stator 21, then stacking the workpieces W on the stacking mechanism 3.