A system for automated mounting and dismounting of at least one cutting insert on a tool body with a screwing tool is provided. The cutting insert includes a top surface, a bottom surface, a circumferential side surface connecting the top and bottom surfaces, and a through hole extending from the top surface to the bottom surface for receiving the shaft of a fastening screw. A carrier device is arranged to pick up and release the cutting insert with the fastening screw. The carrier device has a body having a front surface, a rear surface, a circumferential side surface connecting the front and rear surfaces, and a channel extending from a front end opening in the front surface to a rear end opening in the rear surface. A method for automated mounting of a cutting insert with a fastening screw on a tool body is also provided.