Disclosed is a polygon mirror device with discontinuous angles of reflections discontinuously to reflect a light beam from a light source with at least one angle. The polygon mirror device with discontinuous angles of reflections comprises a motor connecting with a base to rotate the base around a rotation axis. The base has an axial end surface to form a reference plane. The reference plane is approximately perpendicular to the rotation axis. A plurality of reflectors is positioned on the reference plane circularly around the rotation axis. The reflectors tilt relative to the reference plane with respective angles to form respective included angles. When the base is rotated around the rotation axis, at least one of the reflectors is moved to a reflecting location for receiving the light beam from the light source and reflects the light beam with an angle of reflection to form an image at a specific place.