Body temperature is usually measured in three ways: axillary, oral and rectal, and the normal range of the three methods differs. The most commonly used method of temperature measurement in life is the axillary thermometry, which involves placing the mercury end of the thermometer on the top of the armpit, and the examinee clamping the thermometer with the upper arm and placing it for 10 minutes to take out the reading, with a normal value of 36-37℃. The oral thermometry method is to place the mercury end of the sterilized thermometer under the tongue of the examined person and place it for five minutes with the lips tightly closed to take out the reading, the normal value is 36.3-37.2℃. Rectal thermometry is to take the side position, the anal thermometer of the blunt end of the lubricant, slowly inserted into the anus up to half of the thermometer, placed for five minutes to take out the reading, the normal value of 36.5-37.7 ℃.