Abstract: The present invention relates to a multifunctional autonomous serving robot and, more specifically, to a multifunctional autonomous serving robot which has a serving function, and to which additional unique functions other than the serving function can be easily added or modified using an independent module to activate a variety of functions and thus maximize the utility and usefulness of the serving robot.

Abstract: A restaurant service robot moves to a target table along a movement path in a state in which a plurality of trays, on which food can be placed, are arranged to be vertically spaced a predetermined distance apart from each other to form a multi-layer structure and food is accommodated on the trays, so as to induce, through a voice or a display, a customer to take the food. The restaurant service robot comprises a communication function unit, an image receiving unit, a path search unit, one or more tray seating units, an information display unit, and an external input unit.

Abstract: A system and method for securing a lost terminal using a wireless network are provided. The system includes a lost terminal registration server to store unique terminal information of a lost terminal, and a terminal including a wireless Local Area Network (LAN) module to connect to the lost terminal registration server to determine whether the terminal is registered as a lost terminal in the lost terminal registration server. If the terminal is determined to be a lost terminal, then the lost terminal may be tracked and/or locked to secure the terminal.