To supply proper amount of parts timely while interlocking to the real progress state of a production field and reducing a carrying man hour.

When POP(POINT OF PRODUCT) server 6 catches a real progress state by POP terminals 7 of production lines MA, MB and its result reaches a set value, the label of a required part is issued from the label printer 9 of a part storehouse and a part truck 15 is prepared. A route number command is issued to a self-running can 10 in a standby place 2 through the self- running car controller 3. The self-running car runs automatically based on the route number command and connects a truck automatically at part storehouse X, Y and returns to the standby place again after separating automatically at the line side of a carrying destination. As the label is issued at the point of time by using the set value in response to an advance time calculated per parts, the parts can be supplied with a timing reflected the progress state precisely not requiring a recalculation.