System, method and device for sharing digital television program

The invention provides a system, method and device for sharing a digital television program and relates to the technical field of communication. The system, method and device for sharing the digital television program are invented in order to enable a user to share the digital television program on terminal equipment except a television connected with a set top box. The system comprises the set top box and at least one terminal equipment, wherein the set top box can be connected with the at least one terminal equipment by a network. The method for sharing the digital television program comprises the following steps of establishing a network connection between the set top box and the terminal equipment and receiving a tuning resource query command of the terminal equipment, wherein the tuning resource query command is used for querying whether an available tuning resource used for the terminal equipment exists or not; receiving a playing request and a playing parameter of the digital television program when the condition that the available tuning resource exists currently is determined, and acquiring transport stream (TS) data of the digital television program according to the playing request and the playing parameter by using the available tuning resource of the terminal equipment and sending the TS data to the terminal equipment so as to enable the terminal equipment to play the digital television program. The system, method and device for sharing the digital television program provided by the invention can be used for the implementation technique of digital television program sharing.