A ladder-library management apparatus that manages a library used in a machine connected via a network includes an incorporated-information storage area that stores incorporated information in which the machine is associated with identification information of a device connected to the machine and a version number of the library used for the device, a library storage area that stores library data in which the identification information, information about the device, and information about the library are associated with each other, and a library server that adds or updates the library provided in the machine on the basis of the library data stored in the library storage area and that updates the incorporated information stored in the incorporated-information storage area.
展开▼
