Intraoperative electrocorticography (ECoG) is the application of cortical and/or deep electrodes to monitor abnormal epileptic discharge activity in certain areas of the brain during surgery to aid in localizing the epileptogenic focus and thus guide surgical resection. ECoG is currently used in approximately 80% to 84% of epilepsy centers worldwide to guide intraoperative resection. The use of ECoG in clinical practice is mainly focused on the following aspects: 1. Intraoperative determination of the irritative zone (IZ) to guide the focus and extent of resection. 2. 2. To predict the prognosis of epilepsy surgery based on the ECoG results monitored after resection. 3. Postoperative electrical cortical stimulation with electrodes to localize the functional zone. The advantages of ECoG are: firstly, it is more flexible in intraoperative application and allows monitoring and stimulation of the surgical field and the surrounding cortical area. Secondly, abnormal cortical discharges are monitored at any time before and after resection and guide the surgery. Finally, the site of functional cortex monitored by ECoG is very clear and relatively more certain to protect. However, ECoG also has very clear disadvantages: it cannot be monitored adequately due to the limitation of surgery time, it can only monitor abnormal discharges in the interictal period (IED), but it is difficult to capture the origin area (IOZ) of the attack, and it cannot distinguish whether the IED generated locally at the monitored site is transmitted from other distant sites.