The invention discloses a realization method of a multimedia engine. The user selects start on man-machine interface MMI; a general control module sends orders to source element, general coding/decoding element and receiving element after receiving the start notice sent by MMI, so as to start the source element, general coding/decoding element and receiving element; the source element reads the data after receiving the start orders and sends the read data to the general coding/decoding element; the general coding/decoding element carries out coding and decoding on data after receiving the data sent by the source element and sends the data to the receiving element; the receiving element sends the data that are decoded and received to corresponding playing facilities to play and sends coded data to storage devices to store. The realization method of the invention can achieve the same decoding effect with hard-decoding, greatly improves the development efficiency with lower costs and reduces the size and weight of hardware devices.