Skin aging includes natural aging and photoaging. Photoaging is the damage caused by long-term exposure of skin to sunlight, which manifests as wrinkles, rough skin, dryness, laxity, irregular pigmentation changes, capillary dilation, and can even develop into benign or malignant tumors. There are many ways to improve skin photoaging: medication such as topical or oral retinoic acid; cosmetics such as shading agents, antioxidants, keratin exfoliators, etc.; surgical treatment including facelift surgery, blepharoplasty, blepharoplasty; injectable treatment including intramuscular injection of botulinum toxin, filling hyaluronic acid in the skin lesions, etc.; exfoliative treatment including traditional grinding treatment, microdermabrasion, laser grinding such as CO2 laser Non-exfoliative skin rejuvenation treatments include lasers such as frequency doubling KTP laser, pulsed dye laser, Q-switched Nd:YAG laser (1064 nm) and long pulse width Nd:YAG laser (1320 nm), radiofrequency technology and Intense pulsed light (IPL). The results are slow. Drug and cosmetic treatments have the disadvantages of slow effect and poor efficacy; surgical, injectable and exfoliative treatments have certain trauma, slow skin recovery and many postoperative complications; non-exfoliative laser and RF technology are prone to post-inflammatory hyperpigmentation, scarring and other complications, and the wavelength is single and the range of application is small. As a new generation of non-ablative skin aesthetic surgery, intense light has the advantages of minimally invasive, safe, efficient, time-saving, and wide range of indications. Intense light can effectively remove spots, reduce capillaries, remove wrinkles, increase skin elasticity, and improve enlarged pores. Without destroying normal tissues, intense light is selectively absorbed by pigment groups such as melanin particles and hemoglobin, so that pigment groups and dilated blood vessels are destroyed and decomposed, thus achieving the effect of treating pigment spots and capillary dilation. On the other hand, intense light acts on fibroblasts to synthesize new collagen, while collagen and elastic fibers are rearranged to restore elasticity, lighten wrinkles, reduce pores and achieve skin rejuvenation.