It is difficult to determine how large an area is clinically, and there is no clear professional standard for the diagnosis of large burns, which is based on the depth of the burn and the area of the burn to determine the condition. The depth of burns is divided into first-degree burns, shallow second-degree burns, deep second-degree burns, and third-degree burns, plus the area of burns to determine. Mild burns are under 10% of the burn area, and no third-degree burns are called mild burns. A moderate burn is a burn area of 10%-30%, or a third degree burn area of 10% or less is called a moderate burn. A severe burn is a burn area between 30% and 50% of the total area. A third-degree trauma area that can reach less than 20%, between 10%-20% is called severe burns. There are also extra-severe burns. Extra-severe burns are burns with an area of 50% or more, or third-degree burns with an area of 20% or more are called extra-severe burns. The treatment is a three-degree, four-degree method, according to the depth of the burn, plus the area of the burn to reflect the patient’s condition. The concept of large area burns is not yet clear in the burn community, and the patient’s condition is evaluated according to the condition using the three-degree quadrature method.