Many families of patients with intractable epilepsy are wondering if the patient will experience memory loss, dementia, mental abnormalities, etc. after epilepsy surgery. The surgery often requires the removal of the sclerotic hippocampus and medial temporal lobe structures, and the hippocampus is related to memory. In frontal lobe epilepsy patients, the surgery often requires monitoring with buried intracranial electrodes to determine the extent of the lesion, and after surgery, the physician will stimulate the electrodes to determine the function of the corresponding part of the brain, which is “functional mapping”. The functional brain tissue will be protected to the maximum extent while the lesion is removed. This will not lead to mental abnormalities or dementia after surgery. If the diagnosis is medically refractory, surgery should be performed as soon as possible if the patient is assessed to be suitable for surgery.