Neurointervention (neurological intervention) is a new technology that has developed rapidly in recent years after cardiac intervention and with the revolutionary advancement of neurointerventional materials, enabling many patients to realize the dream of performing brain surgery without surgery. Neurointerventional diagnosis and treatment areas: 1. Ischemic cerebrovascular disease (70% of all neurointerventional patients) Interventional patients 70% of the total number of patients): Neurointerventional can clarify the etiology of most cerebral infarcts. Countermeasures: cervical or intracranial endovascular stenting techniques. Prognosis: Most of them can be treated satisfactorily, and the risk of stroke events is greatly reduced. 2. Hemorrhagic disease – cerebral aneurysm (20% of all interventional patients). Response: Simple spring-ring embolization and stenting, balloon-assisted embolization techniques. Prognosis: The prognosis of ruptured and unruptured aneurysm after the above treatment is good, while the prognosis of secondary rupture is poor. The rupture rate of untreated aneurysm is about 50% within six months, and the risk of rupture increases by 1~2% every year thereafter. 3. Mixed type (10% of the total number of interventional patients). ①Cavernous sinus fistula-Countermeasures: Balloon production and embolization techniques. Prognosis: Most traumatic cavernous sinus fistulas can be completely cured, and most spontaneous cavernous sinus fistulas are complicated and most can be improved. ② cerebral arteriovenous malformations and arteriovenous fistulas – countermeasures: glue, pellet and spring coil embolization techniques. Most of them can be cured, but some patients need multiple treatments or combined with surgery and gamma-knife methods. ③Smoke disease: cerebral angiography can clearly diagnose, clarify the scope, degree and nature of lesions, and provide the basis for surgery or medical treatment. ④ Cerebral venous sinus thrombosis-countermeasures: thrombolysis and stent therapy. Stenting is effective in patients with limited stenosis of cerebral venous sinus. ⑤ Intracranial and neck tumors with abundant blood flow – countermeasure: preoperative embolization technique. Greatly reduces intraoperative bleeding and improves surgical safety. (6) Refractory nasal hemorrhage – countermeasure: gum and pellet embolization technique with satisfactory results. (vii) Super-selective thrombolytic therapy for ischemic ophthalmopathy. (viii) Other vascular diseases of the head and face. The accidental incidence of complications of cerebral angiography in regular large domestic hospitals is one to three in ten thousand, and the incidence of treatment varies with the lesion condition. Neurointerventional treatment is a safe and reliable methodology.