A roll press method according to an embodiment comprises a roll gap measuring step for measuring a roll gap between an outer peripheral surface of the first roll and an outer peripheral surface of the second roll at one or more positions in a width direction of the first roll while rotating the first roll and the second roll and storing the measured roll gap and rotation angles of the first roll and the second roll in association with each other; and a roll press step for adjusting, according to the rotation angles, a position in the facing direction of the first roll by the adjustment mechanism such that the roll gap is kept within a predetermined variation range with respect to a target value and pressurizing the work by using the first roll in which positions are adjusted in accordance with the rotation angle and the second roll.