An information processing device in accordance with the present invention provides assistance for displaying correct entry candidates depending on circumstances when entering a machining program. The information processing device includes a program collection unit configured to collect programs entered in numerical controllers, a program entry history storage unit configured to store the collected programs, a ranking information creation unit configured to create ranking information based on counting and scoring of the programs stored in the program entry history storage unit, a ranking information storage unit configured to store the ranking information created by the ranking information creation unit 11, and a ranking information distribution unit configured to distribute the ranking information stored in the ranking information storage unit to the numerical controllers.