Disclosed are a lawn mower robot and a control method thereof. The lawn mower robot includes a boundary indication unit (100) including a boundary wire (110) defining a work area and a main body (10) moving within the work area defined by the boundary wire (110), the main body (10) includes sensing units (30) sensing voltage values induced by the boundary wire (110) and a controller (20) determining a distance between the main body (10) and the boundary wire (110) from the voltage values sensed by the sensing units (30), each of the sensing units (30) includes at least two coils (32, 36) differently installed, and the two coils (32, 36) respectively sense voltage values within the same area defined by the boundary wire (110).
