To attain service offer corresponding to the processing capability of a terminal or the communication capability of communication infrastructure even when plural communication infrastructures coexist without necessitating any large-scaled server computer in a network environment in which each kind of terminal is present, and to provide a system in which service offer is operated by changing display content/style for each group.

Each function as an information exchanging device is distributed to each service computer 1b-1e different from a service computer 1a having an applied service part 20. The server computer 1a retrieves the server having the function necessary for information exchange from among each server 1b-1e, and converts service information into a specific format by using the function, and transmits it. Thus, a high level information exchanging processing function can be realized by combining the plural servers whose processing capability is not high, and server offer corresponding to the processing capability of a terminal or the communication capability of communication infrastructure can be attained. Also, service offer can be attained by changing display content/style for each group.