Provided are a method and a device for setting an operating channel in a white space band. A method of setting an operating channel in a white space band by a device includes: receiving, by the device, a White Space Map including information on an available TV channel and an offset value in the available TV channel, and setting, by the device, the operating channel based upon the information of the available TV channel and the offset value from the available TV channel, wherein the offset value indicates a shifted amount of a center frequency of the operating channel from the center frequency of the available TV channel.