A mobile terminal (10, 100) set to an administrator account, comprising: a display unit configured to display information; a memory configured to store channel information; a wireless communication unit configured to perform a wireless communication with a broadcasting terminal; and a controller configured to: - control the wireless communication unit to transmit a turn-on control signal for turning on the broadcasting terminal and the channel information to the broadcasting terminal in order for the broadcasting terminal to output a broadcast content received from a broadcast channel matched to the channel information in the course of being turned on; - receive, via the wireless communication unit, when the broadcasting terminal receives a channel changing signal from another mobile terminal set to a user account while the broadcasting terminal outputs a first broadcast content of a first broadcasting channel, a query message from the broadcasting terminal to query whether to apply the channel changing signal to the broadcasting terminal, and - control the display unit to display a preview image (1710, 1820) of a second broadcast content of a second broadcast channel, the query message comprising the preview image. a display unit configured to display information; a memory configured to store channel information; a wireless communication unit configured to perform a wireless communication with a broadcasting terminal; and a controller configured to: - control the wireless communication unit to transmit a turn-on control signal for turning on the broadcasting terminal and the channel information to the broadcasting terminal in order for the broadcasting terminal to output a broadcast content received from a broadcast channel matched to the channel information in the course of being turned on; - receive, via the wireless communication unit, when the broadcasting terminal receives a channel changing signal from another mobile terminal set to a user account while the broadcasting terminal outputs a first broadcast content of a first broadcasting channel, a query message from the broadcasting terminal to query whether to apply the channel changing signal to the broadcasting terminal, and - control the display unit to display a preview image (1710, 1820) of a second broadcast content of a second broadcast channel, the query message comprising the preview image. - control the wireless communication unit to transmit a turn-on control signal for turning on the broadcasting terminal and the channel information to the broadcasting terminal in order for the broadcasting terminal to output a broadcast content received from a broadcast channel matched to the channel information in the course of being turned on; - receive, via the wireless communication unit, when the broadcasting terminal receives a channel changing signal from another mobile terminal set to a user account while the broadcasting terminal outputs a first broadcast content of a first broadcasting channel, a query message from the broadcasting terminal to query whether to apply the channel changing signal to the broadcasting terminal, and - control the display unit to display a preview image (1710, 1820) of a second broadcast content of a second broadcast channel, the query message comprising the preview image.