Normal human basal energy metabolism refers to the level of energy consumed per unit time measured in the resting state of quiet and fasting, usually measured by the oxygen consumption rate. The energy range of normal human basal metabolism is minus 10% to plus 15%. In a healthy state, all vital activity indicators of the human body are relatively stable and are usually measured by measuring blood pressure, heart rate, pulse rate and body temperature to calculate the range of normal basal metabolism. However, in pathological conditions, such as hyperthyroidism, hyperadrenocorticism, body fever, abnormal cardiopulmonary function, leukemia and malignant tumors, the normal range of basal bulk metabolism is increased. Conversely, in cases of hypothyroidism, cachexia, hypoadrenocorticism, anorexia nervosa, and cold stimulation, the normal range of basal bulk metabolism is reduced.