Abstract: The present invention provides a self-moving device. The automatic working system includes: a self-moving device, configured to move and execute a work task within a working area defined by a boundary; and a magnetic device, disposed within the working area or at a position near the boundary of the working area, where the self-moving device includes a boundary recognition module, a magnetic signal detection module, and a control module; the boundary recognition module is configured to recognize the boundary of the working area; the magnetic signal detection module is configured to detect a magnetic signal generated by the magnetic device to further recognize the boundary of the working area and/or guide the self-moving device; and the control module is configured to control a movement pattern of the self-moving device based on a recognition result of the boundary recognition module and/or a detection result of the magnetic signal detection module.