Mobile robot system and control method thereof

A mobile robot comprising:

• a memory that stores a map of an area through which the mobile robot travels;
• a communication interface that receives a command from a terminal;
• an obstacle sensor that detects an obstacle in the area;
• and
• a controller that updates the map to include information on a travelable portion of the area based on information on the obstacle received from the obstacle sensor, and controls a movement of the mobile robot to pass or avoid the obstacle while traveling in the area based on the map,
• wherein, when the command relates to a virtual wall to restrict the movement of the mobile robot, the controller further registers the virtual wall on the map and controls the movement of the mobile robot through the area to avoid a location associated with the virtual wall, and
• wherein the controller analyzes data of the virtual wall received from the terminal, determines an area on the map with respect to the virtual wall, and expands the area of the virtual wall to a wider range to register on the map, and the controller recognizes and avoids the expanded area of the virtual wall as an obstacle even when the obstacle sensor does not detect an actual obstacle in the location associated with the virtual wall.