To provide the method for adaptively formatting communication by which the performance of data transmission on a communication network connecting a data network to a user is enhanced.

An access server 20 formats data and the resulting data are sent to a user 14. The set trans-coding technology is used to encode (or compress) the data and the set error control scheme is used to correct and conceal errors produced in the case of transmission. The trans-coding technology an the error control scheme used for formatting the data are adaptively selected based on characteristics of the communication network connecting to the access server in the data network, the preference of the user, and types of data sent to the user (or access server) or the like.