To find out someone to talk to when it is desired to talk with someone about a television program while viewing the program.

When the instruction of a chat participation request is received from a user, a digital broadcast receiving apparatus 30 transmits information specifying the program under receiving and information indicating a will of chat participation through a modem to a management system 51. When the management system 51 is notified of two or more chart participation wills with respect to the same program, a construction of a chat room is requested to a distribution server 52 connected to the Internet. A URL required for accessing the chat room is transmitted from the distribution server 52 to each receiving apparatus 30 and the URL is displayed on a screen of the receiving apparatus 30. Every user starts reading software in his personal computer 40 having an Internet connection environment and inputs the URL to take part in the chat room.