Some studies have shown that using office blood pressure alone to manage hypertensive patients may both overestimate and underestimate blood pressure control, which not only results in a waste of medical resources, but is also very detrimental to the health of the patient. If blood pressure compliance is judged solely on the basis of whether office blood pressure is below 140/90 mmHg, the blood pressure control rate is <50%. However, if a 24-hour average blood pressure <130/80mmHg is used as the standard for determining compliance, the blood pressure control rate can reach 80%. As we all know, compared with 24-hour ambulatory blood pressure, office blood pressure has a very serious "white coat effect", and ambulatory blood pressure can make these patients avoid overtreatment, reduce costs, reduce the adverse effects of multiple types and large amounts of antihypertensive drugs, and avoid the potential risk of excessive blood pressure drop, which is of great benefit to patients. The benefits. Ambulatory blood pressure monitoring can effectively identify the "white coat phenomenon" when first diagnosing hypertension, and 24-hour ambulatory blood pressure monitoring is also needed to detect "white coat elevation" during antihypertensive treatment. More importantly, 24-hour ambulatory blood pressure monitoring can help identify patients with poor blood pressure control. Because some patients have good blood pressure control during the day and poor control at night, this may be related to the choice of inappropriate antihypertensive medication or to an inadequate dose of medication. Increasing the dose of antihypertensive drugs can increase the magnitude of blood pressure lowering by antihypertensive drugs and also effectively prolong the duration of action of antihypertensive drugs, thus facilitating the control of daytime blood pressure and effectively controlling nighttime blood pressure and morning peak blood pressure. Therefore, if conditions permit, all patients with hypertension, need to perform 24-hour ambulatory blood pressure monitoring, which is a reliable criterion for diagnosing hypertension and determining whether blood pressure is effectively controlled. It can improve the antihypertensive effect of hypertensive patients and reduce the risk of cardiovascular and cerebrovascular events.