Epilepsy is caused by heterogeneous neuronal discharges in the brain, and the best test to record these randomly generated signals in the brain is EEG, which by far cannot be replaced by any imaging test, so EEG is called the “gold standard for epilepsy diagnosis”. In general, hospital EEG is divided into: short time monitoring or long time monitoring. Short-term monitoring is generally divided into 10 minutes, 20 minutes, 40 minutes, 60 minutes, etc. It is mainly used to distinguish epilepsy from non-epilepsy. Long time monitoring is minimum for more than 24 (including 24 hours) and is mainly used for: 1. distinguishing epilepsy from non-epileptic seizures. 2. for capturing the patient’s usual seizures and clarifying the diagnosis of epilepsy classification. 3. for preoperative evaluation of epilepsy surgery. Therefore, long-range video EEG is recommended for most patients with drug-refractory epilepsy, those seeking the best medication regimen, or those seeking surgical treatment for epilepsy.