Abstract: Electronic cochlear implant is an electronic device for restoring deaf people′s hearing with limited electrodes implanted in their cochlear. The purpose of the present work is to develop a flexible product with high reliability and reasonable price. The principles of the cochlear implant and the speech processing strategies are presented. Performance of STFT method in speech processing is proposed for cochlear implant. This method is used for picking up parameters properly to stimulate the auditory nerve of a totally or seriously deaf person, and has great flexibility to choose basic speech characteristics being considered or to adapt special stimulation parameters for a specific patient to get better speech recognition.