An object of the invention is to provide a method and a system for manufacturing a liquid crystal panel, which allow more successful bonding of an optical film to a liquid crystal cell. A pressing force Fa per unit area applied when the optical film is pressed by the first roller and a pressing force Fb per unit area applied when the liquid crystal cell is pressed by the second roller satisfy the relation Fa>Fb. On the first roller side, the feed may fail to be stabilized due to the influence of tension fluctuations or vibration acting on the first optical film, so that air bubbles may occur. When the second roller side, where such an influence does not occur, contributes more to the feed of the liquid crystal cell, the liquid crystal cell can be successfully fed in the process of bonding the optical film thereto.