Symptomatology diagnosis: Although the clinical manifestations are diverse, they are all characterized by chronic, recurrent (sudden onset, sudden termination) seizures, and for the same patient each time, the same symptoms of seizures are shown to be stereotypically repeated. Pediatric seizure manifestations are also characterized by diversity, variability, staccato, and atypicality. Blood, urine and stool: Blood biochemistry (sugar, calcium, phosphorus and electrolytes), cerebrospinal fluid, liver and kidney function, mitochondria, chromosomes and various genetic metabolic diseases can be checked according to the condition. Electroencephalography (EEG): EEG examination can help the diagnosis of epilepsy and help the localization and classification of epilepsy; exclude non-epileptic diseases. Therefore, routine EEG should be done in all children once they present with convulsions. If necessary, an evoked test and 24-hour ambulatory EEG should be performed. Imaging examinations: 1. CT and MRI examinations to understand structural brain abnormalities, such as brain malformations, intracranial calcifications, tumors and developmental abnormalities; 2. positron emission tomography (PET) and single light emission tomography (SPECT) to detect brain metabolic function and cerebral blood flow, to understand functional brain changes and to help localize epilepsy. In addition, fMRI, magnetoencephalography, neuropsychological assessment and transcranial magnetic stimulation are also commonly used to provide reference for epilepsy diagnosis and treatment.