At present, the ideal method of hair removal is ice point hair removal, which is through selective photothermal action and ice point semiconductor laser hair removal instrument, when working, the laser directly penetrates the surface layer of the skin and acts on the hair follicle to keep the hair follicle at a certain temperature, so as to gently make the hair follicle inactive and thus achieve the effect of permanent hair removal. Ice point hair removal can remove unwanted hair painlessly in a large area, which is mechanically different from traditional laser, which uses instantaneous high energy to damage the hair follicle to achieve the effect of hair removal, which has certain stimulation to the skin. The traditional laser uses instantaneous high energy to damage the hair follicle to achieve the effect of hair removal, which is stimulating to the skin.