A lawn mower robot system, comprising: a lawn mower robot disposed with a moving device； a mowing device disposed in the lawn mower robot and mowing lawns； a first communication device disposed in the lawn mower robot and transmitting an inquiry signal for state information； a plurality of boundary display apparatuses, arranged in a lawn presence region, disposed with a second communication device for receiving the inquiry signal for the state information from the first communication device and for transmitting an acknowledge signal for the state information to the first communication device； a controller for recognizing a plurality of absolute coordinates from the lawn presence region based on the acknowledge signal for the state information received from the second communication device and for controlling the mowing device within the limit of the plurality of absolute coordinates.
