As one of the most significant scientific and technological achievements of the twentieth century, laser technology has been combined with medicine to provide a brand-new means for clinical diagnosis and treatment of diseases – laser medicine. Over the past ten years, China’s laser medicine has developed rapidly, and has been increasingly used and developed in the field of plastic and cosmetic surgery, which has solved many problems for clinical treatment with its unique advantages, and has become a major means of cosmetic surgery and has been popularized. Laser cosmetic equipment has brought a brand new concept to the field of cosmetic surgery and provided doctors with a broader treatment space. Here, medical cosmetologists combine high technology with modern science to create a “beauty” miracle for patients and beauty lovers. Q-switch laser therapy instrument, using advanced laser Q-switch technology and laser frequency doubling technology, to get rid of all kinds of pigmented diseases, high safety, thorough, and less painful, without leaving scars. Based on the principle of selective photothermal effect, the laser transmits the laser wavelength into the skin which is preferentially absorbed by the lesion tissue, and selectively destroys the pigment cells without causing burns to the skin, breaks the pigment particles into tiny grains, and then phagocytosis cells in the body will swallow the fragments to be discharged out of the body, leaving no scar after the operation, and it is the first choice of the treatment of nevus of ota and tattoos at present. The former can be nearly completely eliminated after 3 to 5 treatments. Generally speaking, shallow pigmented spots like freckles can be completely removed with only 1 to 2 treatments. Common facial pigmentation spots in plastic surgery department include freckles, coffee spots, inflammatory hyperpigmentation, age spots, nevus of Ota, zygomatic nevus of brownish blue and chloasma, etc. Most of the pigmentation spots can be removed by laser treatment. Most pigmented spots can be cured or significantly improved by laser treatment. The indications of laser treatment for cosmetic skin diseases are various birthmarks: nevus of Ota, coffee spot, freckle-like nevus; skin pigmented lesions: such as freckles, age spots, zygomatic nevus, etc.; removal of various undesirable tattoos, lip tattoos, eyebrow tattoos, eye liner tattoos, and abrasion stains. Various kinds of capillary expansion: rosacea, facial capillary dilatation, spider nevus and so on. In short, laser as a new means of plastic surgery can not be ignored, has provided a good direction for some thorny problems. With the development of laser technology, it will surely provide patients and beauty lovers with more ideal treatment.