A method of acquiring program guide information for a digital television receiver, and program guide method, are provided. A method of channel searching for a digital television receiver, comprising: receiving a digital television transport stream (TS) which includes audio, video, and program information; extracting the program information from the received TS; storing the extracted program information in a storage; accessing the storage to generate a channel list based on the stored program information, wherein the channel list comprises at least one channel number and the at least one channel number comprises at least one main channel number; and navigating the channel list to search a channel number, wherein when the at least the one main channel number has at least one corresponding sub-channel number, the sub-channel number can be listed after the at least one main channel number.