The present invention discloses a system and method for data communication. In the system and method for data communication, a part of communication peers in the communication system are assigned as super peers, and each super peer forwards message according to its route table. When a communication peer logs in the system, network information of the logged communication peer is saved in a super peer which is logically closest to the logged communication peer through messages forwarded among every super peer. And when an origination communication peer searches for a destination communication peer, the network information of the destination communication peer is saved in a super peer which is logically closest to the destination communication peer through the message forwarded among every super peer in super peer layer. The origination communication peer establishes connection with the destination communication peer based on the network information of the destination communication peer, and implements the data communication through the connection established.