System for treating foreign material and method for treating foreign material using same

The present invention concerns a foreign-matter processing system comprising: a cleaning robot which is introduced into a specific area and effects sedimentation or travel so as to remove foreign matter or a fluid mixture containing foreign matter in the specific area; a foreign-matter processing device which subjects the fluid mixture, that has been discharged from the specific area, to processing by means of centrifugal separation or sedimentation separation; a foreign-matter conveying line which is connected between the cleaning robot and the foreign-matter processing device and supplies the fluid mixture that flows in from the cleaning robot to the foreign-matter processing device; and a processed fluid conveying line which is connected between the specific area and the foreign-matter processing device and supplies the processed fluid, from which the foreign matter has been removed in the foreign-matter processing device, to the specific area.