Abstract: Provided is a location tracking system in which a main terminal and a plurality of sub-terminals are configured to conduct wireless communication within a preset distance range which the sub-terminals should keep from the main terminal, and in which the main terminal has a plurality of display parts displaying the respective sub-terminals, whereas each sub-terminal has a warning sound output part. Thereby, when any sub-terminal deviates from a boundary of the preset distance range, the sub-terminal deviating from the boundary of the preset distance range is configured to be immediately displayed on the main terminal and to output a warning sound. Thus, during an outdoor group event (e.g., domestic or foreign travel, mountain climbing, an excursion, etc.), both a leader and participants are able to easily recognize the deviation from the boundary, and any participant can be prevented from becoming accidentally separated from a group. Further, a schedule for the group event, information (e.g.

Abstract: Provided is a location tracking system in which a main terminal and a plurality of sub-terminals are configured to conduct wireless communication within a preset distance range which the sub-terminals should keep from the main terminal, and in which the main terminal has a plurality of display parts displaying the respective sub-terminals, whereas each sub-terminal has a warning sound output part. Thereby, when any sub-terminal deviates from a boundary of the preset distance range, the sub-terminal deviating from the boundary of the preset distance range is configured to be immediately displayed on the main terminal and to output a warning sound. Thus, during an outdoor group event (e.g., domestic or foreign travel, mountain climbing, an excursion, etc.), both a leader and participants are able to easily recognize the deviation from the boundary, and any participant can be prevented from becoming accidentally separated from a group. Further, a schedule for the group event, information (e.g.