Normal body temperature standards for 60-70 year olds take a universal standard, i.e., oral, axillary and rectal temperatures are usually used. The temperature of the mouth is between 36.3 and 37.2℃, the temperature of the armpit is between 36℃ and 37℃, and the temperature of the rectum is between 36.5℃ and 37.7℃. The body temperature of a normal person fluctuates within 24 hours, but the fluctuation is not more than 1℃. However, for the elderly, the basal metabolic rate is relatively low, and at the same time the thermoregulatory mechanism is very slow to respond, so it is possible that the basal body temperature is low and the amplitude of temperature fluctuation increases. In addition, other ways can also be taken to determine, for example, the body temperature exceeds the basal body temperature ≥ 1.1 ℃, or the temperature of the oral cavity continues to be ≥ 37.2 ℃, it can be considered that the elderly appear to have an elevated body temperature, i.e. fever. At this time, the patient went to the hospital in time to consult the doctor, clarify the cause of the disease and follow the doctor’s instructions for treatment.