Moyamoya disease （MMD） is a progressive cerebrovascular obstructive disorder with unknown causes. Cognitive impairment is a common concomitant symptom of MMD， which seriously reduces the quality of life. As a new analysis technology， brain network aims to study the interaction of various regions of the brain macroscopically， which plays an important role in deeply understanding the brain structure and function， exploring the occurrence and progression mechanism and evaluating diagnosis and treatment of brain diseases. Meanwhile， brain network also provides an important method for exploring the mechanism of cognitive impairment of MMD and the diagnosis， treatment and prognosis evaluation of cognitive impairment. This paper reviews the research on cognitive impairment related brain networks of MMD.