A detailed preoperative evaluation is performed before epilepsy surgery. First of all, the doctor should ask the patient and his relatives for detailed information about the seizure history and medication, etc. It is clear that medication does not work well for intractable epilepsy. Then video EEG monitoring is performed. Video EEG is performed while the patient is hospitalized. Real-time video recording of the patient while recording the EEG can be performed for 24 hours or even days to record the patient’s seizures so that the seizure performance and where the seizure discharges start during the seizure can be objectively analyzed. Another routine test is a high-resolution magnetic resonance imaging (MRI) scan, which can detect small lesions in the brain. Sometimes these tests are not sufficient, and electrodes may need to be placed directly on the surface of the brain and deep within the brain for EEG recording to determine this. Other tests such as SPECT and PET are also useful in complex cases. Therefore, the preoperative examination may vary from case to case. At present, our hospital has hardware comparable to those of developed countries in Europe and the United States in the preoperative evaluation of epilepsy, such as long-range video EEG monitoring equipment, high-resolution MRI, PETCT, etc. And our neurosurgery department has accumulated considerable successful experience in the surgical treatment of epilepsy.