Method and system of multimedia network transmission based on tree logic

The invention discloses a method and a system of multimedia network transmission based on a tree logic. The system comprises a server and a client; at the server side, the maximum value of file blocks of a file to be transmitted; according to the maximum value, the file to be transmitted into at least one file fragment which comprises at least one file block, and the file block comprises at least one message; a block identification is allocated to each file block and a message identification is allocated to each message; the file blocks are transmitted according to the serial number of each message identification by use of UDP (User Datagram Protocol). According to the technical scheme, the invention provides the method and the system of multimedia network transmission especially suitable for the tress logic, and therefore, the efficiency of the multimedia network transmission can be improved, the utilization rate of network resources can be increased and automatic rate adjustment is easily realized.