Authors report on the general features of the Neurosurgical Intensive Care Unit(ICU). The problems encountered in caring for critically ill neurosurgical patients are quite different from the other medical ICU paradigms. The success of the Neurosurgical ICU depends upon 1) the role of specialized nursing staff who should be aware of what the different symptoms and signs of neurological disorders are 2) monitoring data that must be able to connote changes in the neurological status 3) a concept of cooperation among the other medical departments. The materials studied are obtained from 243 patients who had been treated in the Neurosurgical ICU at SNUH during the last 6 years. Various topics are discussed and our therapeutic methods are explained and a new Neurosurgical ICU model is designed.