The risks of glioma surgery are twofold, one is life threatening and the other is dysfunctional. The life risk mainly comes from a post-operative bleeding of the tumor, which leads to coma and may eventually lead to death, in addition, a large and serious cerebral infarction can also lead to life threatening, serious infections, serious complications of other important organs such as heart and lungs can be life threatening. On the other hand, the brain is a nerve center responsible for various physiological activities of the body, and different areas of the brain have different functions, including language, movement, sensation, vision, etc. When a glioma grows in or near the brain area responsible for a certain function, it may cause compression or invasion of these functional areas, which may lead to corresponding functional disorders. The most common dysfunctions include motor dysfunction, language dysfunction, visual field dysfunction, epilepsy, mental, intellectual and memory dysfunction, etc. Some of these dysfunctions are reversible and can be slowly recovered after surgery, while others are irreversible.