An image display apparatus comprising: a display; a memory storing one or more instructions; and a processor configured to execute the one or more instructions stored in the memory, wherein the instructions, when executed by the processor, cause the image display apparatus to: perform a first channel search comprising identifying one or more first valid frequencies in which a signal exists from among a plurality of frequencies available in a corresponding region as a background operation, while simultaneously performing at least one of initial setting operations of the image display apparatus, perform a channel search condition setting operation among the initial setting operations to obtain a channel search condition comprising a type of broadcast signal and a channel type, in response to the channel search condition being obtained through the channel search condition setting operation, perform a second channel search comprising identifying at least one valid channel, each corresponding to second valid frequencies satisfying the obtained channel search condition, from among the one or more first valid frequencies identified through the first channel search, and display a result of the second channel search on the display. a display; a memory storing one or more instructions; and a processor configured to execute the one or more instructions stored in the memory, wherein the instructions, when executed by the processor, cause the image display apparatus to: perform a first channel search comprising identifying one or more first valid frequencies in which a signal exists from among a plurality of frequencies available in a corresponding region as a background operation, while simultaneously performing at least one of initial setting operations of the image display apparatus, perform a channel search condition setting operation among the initial setting operations to obtain a channel search condition comprising a type of broadcast signal and a channel type, in response to the channel search condition being obtained through the channel search condition setting operation, perform a second channel search comprising identifying at least one valid channel, each corresponding to second valid frequencies satisfying the obtained channel search condition, from among the one or more first valid frequencies identified through the first channel search, and display a result of the second channel search on the display. perform a first channel search comprising identifying one or more first valid frequencies in which a signal exists from among a plurality of frequencies available in a corresponding region as a background operation, while simultaneously performing at least one of initial setting operations of the image display apparatus, perform a channel search condition setting operation among the initial setting operations to obtain a channel search condition comprising a type of broadcast signal and a channel type, in response to the channel search condition being obtained through the channel search condition setting operation, perform a second channel search comprising identifying at least one valid channel, each corresponding to second valid frequencies satisfying the obtained channel search condition, from among the one or more first valid frequencies identified through the first channel search, and display a result of the second channel search on the display.