An Internet Protocol Television (IPTV) system and an implementation method thereof are disclosed. The method includes: installing a wireless data card in a television Set Top Box (STB) device through a personal computer (PC), establishing a connection with the STB device, and starting the wireless data card to wirelessly access to the IPTV network; accessing to the IPTV network resources through the PC or the STB device, implementing the IPTV service. This solution realizes that the IPTV user terminal device can access to the network wirelessly so that the IPTV terminal device have mobility in space, thus extending the application scenarios of the IPTV system.