In this work, the oblique helicoidal cholesteric (Ch_OH) device with high reflectivity and full color displaying was obtained by means of photo-electric cooperative regulation. By introducing a left-handed chiral photoswitch (switch 1) into liquid crystal (LC) system, also based on the principle of chiral cancellation of the opposite handedness chiral additive, a chiral agent R811 was used to balance the difference in helical twisted power value before and after Z/E photoisomerization of switch 1, so that the system could reflect circularly polarized light with opposite handedness and the same red-green-blue colors by applying the same electric field intensity before and after light irradiations. On this basis, a double-layer LC cell was constructed, and the cell was subjected to photo-electric stimulation to induce the helical inversion of the upper layer, so that left- and right-handedness Ch_OH structure could be formed in the double-layer structure. As a result, the reflectance of the system was increased by around 60% in the device structure with full reflection effect. This study provides a new idea for the preparation of full-color electronic paper devices with high reflectivity, and also provides a useful exploration for the application of photoswitch materials in LC devices.