This report describes the objectives, problems, and current techniques associated with using EEG maps in the management of surgery of epilepsy. The purpose of EEG mapping in epilepsy is to precisely identify and characterize epileptogenic zones of the brain. Such zones may be single or multiple, pointlike or diffuse, and may be near or distant from the recording electrodes. The resulting measured electric fields are used to obtain information which, when analyzed in light of all the complementary clinical information, can frequently help to localize and describe the epileptic foci with more precision.