Stethoscope measurement of blood pressure is mainly for mercury column sphygmomanometers, and the stethoscope should be placed under the brachial artery of the cuff where fluctuations are evident during auscultation. In the process of gradual deflation, the heart sound auscultated to the first time is used as the systolic pressure, or high pressure, in blood pressure, and the sound auscultated to the last time is the standard for low pressure. The current blood pressure values for normal people are below 120/80 mmHg and above 140/90 mmHg is considered hypertension. When diagnosing hypertension, the average of three blood pressure measurements on non-same day should be used as the diagnostic criterion, and not based on one blood pressure measurement. When measuring blood pressure, patients must pay attention to rest, rest for at least 5 minutes, calm down and do not overstress.