An apparatus for global television (TV) channel sharing, operating as a sharing client, comprises a registration module, a TV signal receiving module, a multimedia data encoding module, and an Internet communication module. The registration module receives a network address of a subscription client from a mediation server. The TV signal receives module receiving local TV signals after receiving the network address of the subscription client. The multimedia data encoding module encodes the local TV signals into a bitstream. The Internet communication module transmits the bitstream to the subscription client corresponding to the network address via the Internet.