1. Determine if the epilepsy is detailed questioning of the patient and witnesses such as relatives or colleagues: Obtaining as detailed and complete a seizure history as possible is the key to an accurate diagnosis of epilepsy. EEG is the most important tool for diagnosing seizures and epilepsy and helps in the classification of seizures and epilepsy. EEG should be performed in all cases of clinically suspected epilepsy. It is important to note that the general abnormality rate of conventional EEG is very low, about 10-30%. In contrast, the standardized EEG, with its appropriately prolonged tracing time, various evoked tests, especially sleep evocation, and pterygoid electrode tracing if necessary, significantly improves the detection rate of epileptic discharges, increases the positive rate to about 80%, and significantly increases the accuracy of epilepsy diagnosis. The type of seizure: mainly based on the detailed medical history, standardized EEG examination, and video EEG test if necessary. 3. Etiology of epilepsy: After the diagnosis of epilepsy is established, attempts should be made to identify the cause. In the medical history, we should ask whether there is any family history, birth and growth, encephalitis, meningitis, traumatic brain injury and other medical history. The physical examination should include the presence of neurological signs and systemic diseases. Then select relevant tests, such as cranial magnetic resonance imaging (MRI), CT, blood glucose, blood calcium, cerebrospinal fluid examination, etc., to further identify the etiology. Differential diagnosis: A wide variety of seizure events exist clinically, including both epileptic and non-epileptic seizures. Nonepileptic seizures can occur at all ages. Nonepileptic seizures include a variety of causes, some of which are disease states such as syncope, transient ischemic attack (TIA), seizure-evoked movement disorder, sleep disorders, multiple tics, and migraine, and others are physiological phenomena such as breath-holding seizures, sleep myoclonus, and night terrors. The differential diagnosis process should involve detailed questioning of seizure history and efforts to find the cause of the seizure. In addition, EEG, especially video EEG monitoring, is of great value to distinguish epileptic seizures from non-epileptic seizures. In cases where diagnosis is difficult, referral to a specialist is possible.