Abstract: A component mounting system is a system in which a mounting machine and an inspection device are connected to a management device so as to enable data communication therewith. The mounting machine includes a mounting analysis unit that acquires suction position shift data for each component mounting operation of a mounting head. The inspection device includes an inspection analysis unit that acquires mounting position shift data corresponding to each of a plurality of target mounting positions. The management device includes a mark generating unit and a display unit. Based on each suction position shift data and each mounting position shift data, the mark generating unit generates a suction shift mark and a mounting shift mark each of which visualizes the direction and the size of a positional shift. The display unit displays each suction shift mark or each mounting shift mark at each marking position on board graphics.