A robot system includes an image pickup apparatus that picks up images of a plurality of kinds of articles conveyed by a conveyor; an article controlling portion that controls time and a position of each of the plurality of kinds of articles being supplied onto the conveyor, to limit kinds of articles to be image-picked-up by the image pickup apparatus in advance; a detecting portion that detects the plurality of kinds of articles from among images picked up by the image pickup apparatus, on the basis of the kinds of articles limited in advance by the article controlling portion; and a robot that is configured to take out the plurality of kinds of articles detected by the detecting portion from the conveyor.