Transfer of liquid crystal panels to subsequent processes is performed with the panels placed on transfer arms and held by suction pads. A small suction force can be sufficient, and a suction irregularity is prevented. The transfer arms are arranged at a lower side of the liquid crystal panels, thus not obstructing the liquid crystal panels. In arranging the liquid crystal panels at an image pickup device, a panel holding device is controlled to be driven so as to position panel marks to a bonding height position while negating a deflection amount of the liquid crystal panels, and furthermore a component holding device is controlled to be driven so as to position component marks to the bonding height position and to mount electronic components to the liquid crystal panels at the bonding height position.