A mounting system comprising: a mounting line comprising multiple mounting machines for mounting a component on a board that are aligned side by side in a predetermined arrangement direction, with the predetermined arrangement direction being the direction of the mounting line with respect to the position of the supply device; a supply device configured to move in the arrangement direction to convey a mounting machine member for use in the mounting machines and supply the mounting machines with the members; and a reporting section (26, 76) configured to issue a warning when the member is not supplied to the mounting machines by the supply device. characterized by: a reporting control section configured to perform a determination process for determining whether the member is supplied to the mounting machine by the supply device and cause the reporting section (26, 76) to issue a warning when it determines through the determination process that the member is not supplied, and the reporting control section acquires a work scheduled time of work including at least one of conveying the member and supplying the member to the mounting machine that are performed by the supply device and determines whether the member is supplied based on whether the work is performed by the work scheduled time in the determination process. a mounting line comprising multiple mounting machines for mounting a component on a board that are aligned side by side in a predetermined arrangement direction, with the predetermined arrangement direction being the direction of the mounting line with respect to the position of the supply device; a supply device configured to move in the arrangement direction to convey a mounting machine member for use in the mounting machines and supply the mounting machines with the members; and a reporting section (26, 76) configured to issue a warning when the member is not supplied to the mounting machines by the supply device. characterized by: a reporting control section configured to perform a determination process for determining whether the member is supplied to the mounting machine by the supply device and cause the reporting section (26, 76) to issue a warning when it determines through the determination process that the member is not supplied, and the reporting control section acquires a work scheduled time of work including at least one of conveying the member and supplying the member to the mounting machine that are performed by the supply device and determines whether the member is supplied based on whether the work is performed by the work scheduled time in the determination process. a reporting control section configured to perform a determination process for determining whether the member is supplied to the mounting machine by the supply device and cause the reporting section (26, 76) to issue a warning when it determines through the determination process that the member is not supplied, and the reporting control section acquires a work scheduled time of work including at least one of conveying the member and supplying the member to the mounting machine that are performed by the supply device and determines whether the member is supplied based on whether the work is performed by the work scheduled time in the determination process.