Green area maintenance system , comprising: - an autonomous mobile green area maintenance robot having a treatment tool , - a cutting tool differing from the treatment tool, - wherein the green area maintenance robot and the cutting tool are configured to allow fixing of the cutting tool to the green area maintenance robot, - a user control device , - an autonomous operation mode and a cutting operation mode, wherein in the autonomous operation mode the autonomous mobile green area maintenance robot with its treatment tool operates autonomously and the cutting tool is set out of operation, and wherein, in the cutting operation mode, the cutting tool is fixed to the green area maintenance robot and operable, and the green area maintenance robot with its treatment tool and the cutting tool are controlled by a user by means of the user control device, and - an operation mode switching device for switching between the autonomous operation mode and the cutting operation mode, - wherein the green area maintenance system includes a cutting tool attachment part , wherein the cutting tool attachment part comprises the cutting tool , and - wherein the autonomous mobile green area maintenance robot and the cutting tool attachment part are configured to allow removable fixing of the cutting tool attachment part on the green area maintenance robot, - wherein the operation mode switching device is configured to detect fixation of the cutting tool attachment part on the autonomous mobile green area maintenance robot and to switch the green area maintenance system over to the cutting operation mode, and/or to detect a removal of the cutting tool attachment part from the green area maintenance robot and to switch the green area maintenance system over to the autonomous operation mode. - an autonomous mobile green area maintenance robot having a treatment tool , - a cutting tool differing from the treatment tool, - wherein the green area maintenance robot and the cutting tool are configured to allow fixing of the cutting tool to the green area maintenance robot, - a user control device , - an autonomous operation mode and a cutting operation mode, wherein in the autonomous operation mode the autonomous mobile green area maintenance robot with its treatment tool operates autonomously and the cutting tool is set out of operation, and wherein, in the cutting operation mode, the cutting tool is fixed to the green area maintenance robot and operable, and the green area maintenance robot with its treatment tool and the cutting tool are controlled by a user by means of the user control device, and - an operation mode switching device for switching between the autonomous operation mode and the cutting operation mode, - wherein the green area maintenance system includes a cutting tool attachment part , wherein the cutting tool attachment part comprises the cutting tool , and - wherein the autonomous mobile green area maintenance robot and the cutting tool attachment part are configured to allow removable fixing of the cutting tool attachment part on the green area maintenance robot, - wherein the operation mode switching device is configured to detect fixation of the cutting tool attachment part on the autonomous mobile green area maintenance robot and to switch the green area maintenance system over to the cutting operation mode, and/or to detect a removal of the cutting tool attachment part from the green area maintenance robot and to switch the green area maintenance system over to the autonomous operation mode. <EOS>