To enable purchase for the unit of contents by easily confirming contents before purchase.

Concerning each of media, reproducing limiting (enciphering) is loaded so as to view only a prescribed audition part. When the purchase of contents recorded on the medium is requested from a terminal 2, a managing center 3 calculates rates corresponding to the purchase period of contents from the rate table of respective contents held in a managing center server 4 and reports the rates to the user. Besides, when a rate paying procedure is performed from the terminal 2, the managing center 4 transmits a reproducing limit cancel code to the terminal 2. On the basis of the reproducing limit cancel code, the terminal 2 can reproduce all the purchased contents just for the purchased period.