The advantages of coronary enhancement CT and coronary angiography are that they are cheaper, relatively noninvasive, faster, and more acceptable to patients, and can look at the lumen as well as the wall, and are mainly used to screen for coronary artery disease, with the disadvantage that there is a certain false positive rate. The advantage of coronary angiography is its accuracy, and it is still used clinically as the gold standard for the diagnosis of obstructive coronary artery disease. Its disadvantage is that it is relatively complex, expensive, and poorly accepted by patients, and there are certain risks associated with postoperative monitoring, so the choice depends on the clinical situation. If it is used for screening, coronary enhancement CT can be done, and if it is used to confirm the diagnosis or if there are already problems with coronary enhancement CT, coronary angiography can be performed directly.