Angiography is an auxiliary examination technique that is mainly used in vascular diseases to improve the diagnosis and treatment of the disease. The Japanese name “smog disease” is named after the angiographic image of smog disease. Smog is a rare disease in which the skull base arterial ring of the brain is occluded or narrowed, and the abnormal vascular network of the skull base is followed by an angiographic examination, and the image is like smoke. Smog is a rare disease, and because of its rarity most people do not know about smog disease, which leads to frequent misdiagnosis or underdiagnosis of smog disease and misses the best treatment time. Smog is a cerebrovascular disease, and its main symptoms are cerebral ischemia and cerebral hemorrhage. Cerebral ischemia is most common in patients with smog disease, and is characterized by recurrent transient paralysis or weakness, very few patients may experience hemianopsia, headache and dizziness, and a few patients may experience involuntary movements or memory loss. In contrast, cerebral hemorrhage is slightly lower compared to cerebral ischemia, and the danger is serious, directly threatening the life of patients. In fact, this worry is superfluous. Although smog is rare, it is not an incurable disease. In recent years, through a large number of cases, it is found that smog disease can be cured by using “combined vascular bypass” surgical treatment, and through return visits, we know that patients not only recover their health, but also return to their jobs or start studying in school again. Combined vascular bypass surgery is the most effective treatment for smog.