High blood pressure not only affects the patient’s blood pressure level, but also is a “trigger” for many diseases. It is understood that, on average, one person dies of cardiovascular disease every 10 seconds in China, and more than half of the people who die of cardiovascular disease are related to hypertension. Hypertension can aggravate atherosclerosis and damage heart, brain and kidney health. Stroke, heart disease, kidney disease, peripheral vascular disease and fundus disease are common complications of hypertension. Therefore, patients with hypertension should pay attention to the following five types of laboratory tests, especially the last four types of tests that can provide timely information about target organ damage (Heart, brain, kidney and blood vessels are the target organs of hypertension. Hypertension is the primary risk factor causing stroke, the second risk factor causing myocardial infarction in coronary heart disease, and the third risk factor causing kidney failure.) 1, basic examination: blood routine, urine routine, blood biochemistry, electrocardiogram, chest X-ray, etc.. Among them, blood biochemistry should pay special attention to blood potassium sodium chloride, blood creatinine, uric acid, blood lipid and blood sugar index. 2.Cardiac examination: echocardiography, exercise test, cardiac coronary CT, coronary angiography, cardiac radionuclide imaging, etc. 3.Brain examination: cerebrovascular Doppler ultrasound, cerebral angiography, cranial CT and magnetic resonance examination. 4.Renal examination: urine microalbumin, urine albumin quantification, kidney ultrasound. 5.Vascular examination: carotid artery ultrasound, lower limb artery ultrasound, bare arm blood pressure index, pulse wave conduction velocity.