Abstract: The invention is a system for controlling the key-lock switch by output or cutoff the electronic control signals to switch the key-lock device through editing the received/transmitted information data via spread frequency digital modulation/demodulation. The confidentiality and privacy is even re-enforced when the received/transmitted information data is further protected through encryption and decryption process. The system includes: a. at least an electronic key which is operable to transfer the information data, and the information data is transmitted in the form of radio frequency signal after being edited by baseband coding technology and digital-to-analog convert technology; and b.