EEG is an important adjunctive test that can be used to examine epilepsy, and epilepsy diagnosis is confirmed mainly based on eyewitness observation of the clinical symptoms of the patient at the onset of the disease. EEG is an important adjunct to the diagnosis of epilepsy. EEG is a significant adjunct to the diagnosis of epilepsy, the typing of epilepsy, and the identification of specific epileptic syndromes. Seizures can be recorded as epileptiform discharges on EEG, but in practice, because of operational limitations, routine scalp EEG only records epileptiform discharges in about 49.5% of patients, and induction methods such as hyperventilation or flash stimulation can be used to further increase the positive rate of EEG. Therefore, the possibility of having epilepsy cannot be excluded in patients with normal EEG.