Abstract: Scar is the common disease in the field of burn and plastic surgery, and its diagnosis and treatment should be involved in overwhelming majority hospitals. There are many substandard methods and medical hidden dangers in diagnosis and treatment of scar, due to the unevenness of doctors′ clinical experience. According to the classification of integral scar and diabrotic scar, the problems related to diagnosis and treatment of scar are systemically summarized and normalized in this article for decrease in the incidence of adverse events and medical hidden dangers.