To perform charging according to time when download type contents are displayed and referred to the contents such as web contents and to manage any of stream type content utilization such as a VoIP call and download type content utilization such as web content reference by the same charging method by use time.

In a charging device which performs the charging according to output time of communication contents, in a communication terminal (101) which obtains and displays the contents from a content providing server (116), it is provided with a content output time management means (110) for managing the display time of the contents, counts the output time of the contents on the communication terminal (109) and transmits its counting result to a charging server (110).