Photorejuvenation has been in clinical use for nearly 20 years and has become widely familiar to beauty lovers. The light source is a high-powered xenon lamp that filters out harmful short-wave light and filters out continuous wavelengths of light (560nm to 1200nm) for treatment. As the skin ages, many pigmentation spots, capillary filaments, enlarged pores and wrinkles will appear on the face. Photon works on several major problems, and it uses the photothermal and chemical effects produced by intense pulsed light to produce therapeutic effects. In the optical treatment window (600-1300nm) near the short wave boundary hemoglobin has two absorption peaks of 542 and 577nm, melanin in the entire visible light, so photorejuvenation has a certain effect on pigment and vascular problems, in addition to photothermal action can stimulate the skin, so that the dermis collagen fibers and elastic fibers to produce chemical changes in the molecular structure, the number increases, rearrange, restore its original In addition, photothermal action can stimulate the skin to produce molecular structural changes in the collagen and elastic fibers of the dermis, increasing their number, rearranging them, and restoring their original elasticity, thus achieving the treatment effect of eliminating wrinkles and reducing pores. Broad-spectrum therapeutic properties are the advantages of photonics. However, it should be noted that the melanin at the surface is the first to absorb light energy, similar to a barrier, so considering the absorption of light by the melanin in the epidermis, the photon cannot use higher energy, otherwise it will cause damage to the epidermis. This makes the effect of phototherapy relatively slow.