Minimally invasive head surgery is divided into many aspects, which must be judged according to the situation at the time. Generally, craniotomy is not required, and endovascular interventional embolization or adjunctive stent interventional embolization of aneurysms is also minimally invasive, which is an interventional modality, that is to say, intravascular treatment does not require craniotomy. There are also minimally invasive methods for the head, such as transsphenoidal approach to remove pituitary tumor, which is done through the nostril without craniotomy, and stereotactic minimally invasive intracerebral hematoma removal surgery, which only requires a hole about the size of a coin on the outside of the skull, and does not require substantial craniotomy. It is important to clarify what kind of minimally invasive surgery is required.