According to an embodiment of the present disclosure, disclosed is a control method of electro-mechanical brake including a piston configured to move forward toward a wheel disc or backward to the opposite side of the wheel disc, the method including perform a maximum backward position setting of setting a reference position as a maximum backward position when the position at which the piston may move backward at the maximum is referred to as the maximum backward position; perform a position controlling of continuously controlling the position of the piston by moving the piston forward or backward based on the reference position; perform a braking force determining of determining whether a braking force is generated when the piston is located at the reference position during the position controlling; in response to a determination that the braking force is generated, perform a maximum backward position resetting of resetting the maximum backward position as a position other than the reference position; and controlling the position of the piston based on the reset maximum backward position.
