Quantitative electroencephalography（ QEEG） is a noninvasive real-time brain function monitoring method， which has been commonly used in clinical practice in recent years. The changes in neurophysiological conduction caused by damage to the neural network after cerebrovascular disease can be recorded by cortical electroencephalogram， then its regularity can be summarized. Combined with quantitative processing by computer， it can provide objective basis for the development and prognosis of stroke， as well as the evaluation of post-stroke depression and cognitive dysfunction. This article reviews the characteristics and clinical application of QEEG in stroke and post-stroke related diseases