An information processing system includes a request accepting unit for accepting a request for a selected pot to store a selected tool in a pot of a machine tool magazine; a storing unit for storing a setting value in each of a first cell and a second cell of the selected pot; a selecting unit for selecting the first cell or the second cell for the selected pot; a determining unit for determining a condition to store the selected tool in the selected pot on the basis of a size of each tool, a selected cell, and a storage condition of each of the pots; and an informing unit for informing when the condition of storage is not met.