The ice diode laser hair removal method is based on the principle of selective photothermodynamics. By reasonably adjusting the energy and pulse width of the laser wavelength, the laser can penetrate the skin surface to reach the hair follicle at the root of the hair. The light energy is absorbed and converted into heat energy that destroys the hair follicle tissue. It is a technique that makes hair lose its ability to regenerate without damaging surrounding tissues and has a slight pain. laser hair removal is the safest, fastest and long-term hair removal technology. The common methods of laser hair removal include semiconductor laser hair removal, photon hair removal (color light hair removal), and alexandrite laser hair removal.