An automobile detection and control gateway interface and a method thereof are provided. A device provides normal telephone service in the event of an equipment failure. Also, each standard has interchange, functional group, and message templates. The metal oxide layer functions as a protective layer for suppressing incorporation of impurities into the oxide semiconductor layer. A fuel cell having an anode for oxidizing the liquid fuel, a cathode for reducing an oxidizing agent, and an electrolyte film sandwiched between the anode and the cathode is provided. At the same time, the invention discloses a packet sending device, a packet receiving device, and a system for detecting sequence number of the packet during multi-units sending process.