A program creation/supply apparatus connects with a client apparatus via a communication network, and prompts the client apparatus to select one or items of content and enter desired additional information in correspondence with the selected items of content. Program file is created on the basis of content selection information and the additional information transmitted from the client apparatus. The thus-created program file is added to a database. When a user selects a desired program, the program file of the selected program and one or more items of content defining the program are read out from the database and supplied to the user via the communication network. Also, content created by the user can be received via the network and added to the database. The content added to the database can be selected for use in program file creation.