Acne is one of the most common cosmetic problems in dermatology, and is a source of great concern for young boys and girls in the prime of their lives. Traditional treatments are based on three major principles: anti-inflammatory, antiseptic, and skin keratinization regulation, and most patients are able to achieve satisfactory results. However, people’s demands are getting higher and higher, such as taboo about the side effects of oral medication, complaints about the long course of traditional therapy, inconvenient application, as well as some traditional therapies have little effect, so some new technologies and methods have emerged. The 420~950nm wavelength of intense pulsed light can be absorbed by porphyrins, a metabolite of Propionibacterium acnes, to produce single-linear oxygen, which kills the pathogenic bacteria and effectively controls the lesions of inflammatory acne, satisfying patients who have concerns about oral antibiotics and retinoids and require short-term results. In addition 540~950nm wavelength can improve the red marks and pigmentation left behind by acne lesions. Another powerful tool is fruit acid resurfacing, which is effective for almost all types of acne lesions. Fruit acids accelerate the shedding of aging epidermal keratin-forming cells, enhance the speed of epithelial cell metabolism, promote skin renewal, improve hyperkeratosis, roughness and dullness, and post-inflammatory hyperpigmentation. It has good effect on closed and open acne, inflammatory papules, and also improves skin texture, removes fine lines, lightens pigmentation and brightens skin tone. For depressed acne scars – “acne pits” – traditional treatments can only be sighed at. In the past, microdermabrasion and carbon dioxide laser grinding were too damaging and easily left discoloration, but the carbon dioxide fractional laser, which is mildly damaging to the skin, came into being. The fractional laser can instantly vaporize the skin tissue, instantly shrink the lesion, blur the boundary between the scar and normal skin, and stimulate the dermal collagen fiber proliferation and rearrangement, thus achieving the effect of treating acne pits.