A method for operating an image display apparatus, comprising: entering channel scan mode; receiving a broadcast signal of a detected broadcast channel in the channel scan mode; demultiplexing the broadcast signal; determining whether the channel number information and the channel name information are included in the demultiplexed signal of the detected broadcast channel; storing the channel number information and the channel name information about the broadcast channel, if the channel number information and the channel name information are included in the broadcast signal of the detected broadcast channel; storing the broadcast image of the broadcast signal, in the absence of the channel number information and the channel name information in the broadcast signal of the detected broadcast channel; extracting, in the presence of an image representing a channel name in a broadcast image of the broadcast signal and in the absence of the channel number information and the channel name information in the broadcast signal of the detected broadcast channel, the image representing a channel name by image recognition of the demultiplexed signal; determining channel number information and channel name information about the broadcast channel based on the extracted image; storing the channel number information and the channel name information about the broadcast channel in a channel map; and displaying a channel map object corresponding to the channel map, in the absence of the image representing a channel name in the broadcast image of the broadcast signal, further comprising: transmitting an incomplete channel map to a server, receiving, from the server, in response, a complete channel map selected from a plurality of channel maps stored at the server to match the incomplete channel map, wherein the complete channel map comprises channel name information that is missing in the incomplete channel map; and updating the channel map using the received complete channel map. entering channel scan mode; receiving a broadcast signal of a detected broadcast channel in the channel scan mode; demultiplexing the broadcast signal; determining whether the channel number information and the channel name information are included in the demultiplexed signal of the detected broadcast channel; storing the channel number information and the channel name information about the broadcast channel, if the channel number information and the channel name information are included in the broadcast signal of the detected broadcast channel; storing the broadcast image of the broadcast signal, in the absence of the channel number information and the channel name information in the broadcast signal of the detected broadcast channel; extracting, in the presence of an image representing a channel name in a broadcast image of the broadcast signal and in the absence of the channel number information and the channel name information in the broadcast signal of the detected broadcast channel, the image representing a channel name by image recognition of the demultiplexed signal; determining channel number information and channel name information about the broadcast channel based on the extracted image; storing the channel number information and the channel name information about the broadcast channel in a channel map; and displaying a channel map object corresponding to the channel map, in the absence of the image representing a channel name in the broadcast image of the broadcast signal, further comprising: transmitting an incomplete channel map to a server, receiving, from the server, in response, a complete channel map selected from a plurality of channel maps stored at the server to match the incomplete channel map, wherein the complete channel map comprises channel name information that is missing in the incomplete channel map; and updating the channel map using the received complete channel map. transmitting an incomplete channel map to a server, receiving, from the server, in response, a complete channel map selected from a plurality of channel maps stored at the server to match the incomplete channel map, wherein the complete channel map comprises channel name information that is missing in the incomplete channel map; and updating the channel map using the received complete channel map.