A network device and data transmission method for efficient data transmission and reception in a mobile ad hoc network environment. The mobile ad hoc network device includes an encoder for receiving multimedia signals and encoding the received signals depending on predetermined network information in the mobile ad hoc network environment, a database unit for storing the received multimedia signals, a network interface unit for receiving the network information and sending the multimedia signals encoded by the encoder, and a control unit for causing the network information received from the network interface unit to be stored in the database unit and allowing the encoder to perform its encoding operation depending on the received network information.