The present invention relates to a system for automatically processing, in particular of mowing automated, comprising, on the one hand, a mobile robot, in particular of mowing and, on the other hand, at least one means of a delimitation of at least one zone to be treated, or to be mowed, determining the perimeter of the said or each of said zone (s)). A system characterized in that the marking means are constituted by at least two individual terminals are active (2), placed on or planted at least partially into the ground, comprising means of radio transmission and reception suitable and intended to establish a bidirectional communication to the terminal (2) with the robot (1), equipped with similar means compatible with the other terminals (2) used in conjunction with the delimitation of the same zone (3, 3 ′) and, if appropriate, with a portable tool of geolocation, each terminal (2) being positioned on the path of the perimeter (4, 4 ′) to the definition of which it participates.
