The present disclosure relates to a system for confining movement actions of a robot and a method thereof, the system comprising a virtual wall device and a robot, the virtual wall device is configured to receive a barrier detection signal in a predetermined receiving range and to emit a virtual wall signal, through the virtual wall signal, a work space can be virtually divided into a first work area and a second work area. The robot continuously emits the barrier detection signal during its operation and is able to receive the virtual wall signal; when the robot gets into the predetermined emitting range and receives the virtual wall signal, the robot decides to get across or escape by checking the information from the virtual wall signal with its passing record. Therefore, the system can be applied to confine the robot to operate in the first work area or the second work area.