The present invention relates to an agricultural robot system having a laser beam generator to cut peduncles or thin blossoms and, more particularly, to an agricultural robot system for recognizing fruits, flowers, or flower buds from camera input images and then scanning laser beams to cut peduncles or thin blossoms (burn or cure flowers or flower buds), thereby speeding up the operation, and the non-contact operation prevents damage to crops and contamination by viruses and germs and saves on labor.