A component mounting system at which multiple mounter modules equipped with a mounting head are arranged along a conveyance direction of circuit boards, comprising: a component storage cabinet which is configured to store multiple component supply members (34, 37, 102) of multiple types housing different types of components; a traveling body (16, 116) which is configured to automatically travel between the component storage cabinet and the multiple mounter modules; a moving platform provided on the traveling body (16, 116) which is configured to move in a direction parallel to the traveling direction of the traveling body (16, 116); a supply unit loaded on the moving platform which is configured to hold the component supply members (34, 37) and to supply the component supply members (34, 37) to the multiple mounter modules and to collect the component supply members (34, 37) from the multiple mounter modules; wherein multiple shared base platforms are provided, each being configured from one traveling body (16, 116) and one moving platform, for which the configuration is made the same, such as to be shared with respect to the multiple types of component supply members (34, 37, 102), and on each of these multiple shared base platforms is loaded a supply unit which is configured to hold at least two component supply members (34, 37, 102) of one type out of tape feeders, component trays, and bulk cassettes housing different types of components, characterized in that said supply unit is further configured to perform supply and collection of each component supply member (34, 37, 102) while consecutively stopping the traveling body (16, 116) at multiple mounter modules. a component storage cabinet which is configured to store multiple component supply members (34, 37, 102) of multiple types housing different types of components; a traveling body (16, 116) which is configured to automatically travel between the component storage cabinet and the multiple mounter modules; a moving platform provided on the traveling body (16, 116) which is configured to move in a direction parallel to the traveling direction of the traveling body (16, 116); a supply unit loaded on the moving platform which is configured to hold the component supply members (34, 37) and to supply the component supply members (34, 37) to the multiple mounter modules and to collect the component supply members (34, 37) from the multiple mounter modules; wherein multiple shared base platforms are provided, each being configured from one traveling body (16, 116) and one moving platform, for which the configuration is made the same, such as to be shared with respect to the multiple types of component supply members (34, 37, 102), and on each of these multiple shared base platforms is loaded a supply unit which is configured to hold at least two component supply members (34, 37, 102) of one type out of tape feeders, component trays, and bulk cassettes housing different types of components, characterized in that said supply unit is further configured to perform supply and collection of each component supply member (34, 37, 102) while consecutively stopping the traveling body (16, 116) at multiple mounter modules.