Definition of VEEG: Video EEG is the study of brain dysfunction by tracing the spontaneous biopotentials of the brain with the help of electronic amplification technology and monitoring the clinical performance of the patient with the help of video technology. Indications for VEEG: It is most helpful in clinical diagnosis of epilepsy and localization of epileptogenic foci, and also has some diagnostic value for encephalitis, brain tumors, cerebrovascular diseases and sleep disorders. It is also applied to the evaluation of brain function in cerebrovascular diseases; localization and diagnosis of intracranial occupying lesions (tumors, abscesses, hematomas); assessment of brain injury in traumatic brain injury; evaluation of brain function in diffuse brain lesions (demyelinating disease); early diagnosis of hepatic encephalopathy, evaluation of brain function in metabolic encephalopathy; surgical and anesthetic monitoring; drug monitoring; coma and brain death scoring. The significance of EEG for epilepsy diagnosis: 1. Provide comprehensive information about the patient Usually, when an epileptic patient comes to the clinic, the doctor will ask about the onset of the disease, such as seizure frequency, pre-seizure condition, seizure action, and post-seizure, in addition to observing their brain waves, so as to have a comprehensive understanding of the condition. 2.It can help doctors to identify artifacts more accurately because EEG is a very weak signal, which is easily disturbed by external factors, such as the patient’s slight movements, other people’s walking, etc. With the help of video EEG, the patient’s EEG and video signal are synchronously collected and displayed on the same screen, so it becomes easy to identify these artifacts. 3, more direct, more comprehensive, more convenient to observe the patient Video EEG can store, edit, playback the patient’s EEG and video signal synchronously in the same screen and can be long distance, long time (24 hours unattended). Patients can rest in bed, sit in a chair, eat, read, gossip, use the camera to point at the patient’s face and whole body, so as to record any part of the convulsive action during seizures, and record the patient’s EEG with electrodes attached to the head, so that the patient’s face, the image of the convulsion and the EEG during seizures can be displayed on the monitor through one screen, and can be stored on the hard disk and CD-ROM. The EEG can be stored on a hard disk and CD-ROM for repeated study by professionals to find the answers needed for diagnosis and treatment, so that the correct conclusion and the correct treatment can be made for the diagnosis, classification, and localization of the causative agent of epilepsy.