A method for transmitting and downloading streaming data is disclosed. The method comprises (a) establishing connections with a plurality of nodes; (b) sending a request for sub blocks of streaming data to the plurality of nodes where connection is established to download the sub blocks; (c) monitoring download state of the established connections; and (d) redistributing sub Blocks to be downloaded from some of the nodes where connection is established according to the monitoring results; wherein, the step (b) to step (d) are repeated for downloading sub blocks included in next block when all sub Blocks included in a block are downloaded.