1 ) in a network, a first cellular phone that requests presentation of a content via the network, a second cellular phone to be presented with said content, a provider server that holds said content, a carrier server comprising a first carrier server related to said first cellular phone, and a second carrier server related to said second cellular phone connected to one another through the network, wherein said first carrier server comprises: a unit for receiving a content presentation request from said first cellular phone; a database for storing identification information of said first cellular phone and information related to said second cellular phone; a unit for sending content information received from said first cellular phone, identification information of said second cellular phone, and information related to said second cellular phone to said provider server respectively; and a unit for receiving charging information related to presentation of said content sent by said second carrier server, which receives said requested content from said provider server.