Intracranial aneurysms are the leading cause of subarachnoid hemorrhage, with a mortality rate of 25-60% and a disability rate of nearly 50% in survivors. The main causes of death are bleeding and early complications such as cerebral vasospasm. Intracranial aneurysm is an “untimely bomb” in human body. The mortality rate of the first ruptured aneurysm is 20%-30%, and about 30% of those whose aneurysm is not treated after the first ruptured bleeding will die within one year due to another ruptured bleeding, and about 50% will die within 5 years due to another ruptured bleeding. The most common symptom and first sign of subarachnoid hemorrhage due to ruptured intracranial aneurysm is headache, characterized by sudden fulminant onset with malignancy, vomiting, and syncope. Nearly half of the patients have transient impairment of consciousness, which may gradually return to blurred consciousness, drowsiness, and wakefulness. Impaired consciousness is more common and severe in elderly patients. Unruptured intracranial aneurysms may not have any clinical symptoms, but some patients may have unilateral total blindness, bilateral temporal hemianopia, and contralateral hemianopia due to aneurysm compression of nearby nerves. The main purpose of medical treatment for intracranial aneurysm is to prevent rebleeding and control vasospasm. Craniotomy for aneurysm neck clamping is still the most common surgical treatment method. With the maturation of endovascular interventional techniques, more and more physicians are choosing endovascular embolization as a minimally invasive and effective treatment method. The International Subarachnoid Hemorrhage Aneurysm Trial Collaborative Group (IAST) reported the results of an 8-year international multicenter prospective randomized trial of surgical clamping and interventional endovascular spring coil embolization of ruptured aneurysms. 2134 patients with saccular aneurysms eligible for both surgical and interventional treatment were randomized to surgical clamping (1070) and interventional endovascular spring coil embolization (1073). The IAST concluded that interventional endovascular treatment is the best option for the surviving group of aneurysms, especially for complex or multiple intracranial aneurysms, and that interventional treatment has greater advantages. In Europe, a significantly higher percentage of intracranial aneurysms are treated with interventions than surgical procedures, and in France, even more than 97% of intracranial aneurysms are treated with interventions. In the United States, the proportion of intracranial aneurysms treated with intervention is also increasing each year. Surgical treatment is an option for patients who are not suitable for intervention due to clinical or anatomical factors. Interventional treatment uses a microcatheter selectively inserted into the aneurysm cavity, which is completely filled with a special material so that blood flow does not impact the aneurysm wall and prevents re-rupture of the aneurysm.