Abstract: Effects of non-operative therapies for scar are very limited, and operative treatments are also often difficult to get satisfactory results. Safe, effective, simple, and feasible therapy for scar is urgently needed in clinic. Laser has been used for scar treatment for more than 30 years. There are many kinds of lasers, many of which have been reported to be used for scar treatment. Laser and related photoelectric therapies for scar have experienced long period of exploration, from the initial laser of continuous wavelength to the later pulsed laser, from ordinary spot laser in the early period to the present fractional laser. And there are intense pulsed light closely related to laser and non-light energy of micro-plasma radio-frequency technology. In recent years, with in-depth research of related theories, progress of technology and equipment, as well as accumulation of clinical experience, a great progress has been made in laser treatment for scar. In this article, related theories of photothermal interaction on skin tissue of laser, the present lasers and related photoelectric therapies often used for scar are introduced, and the existing problems and further development directions are also discussed.