A method of operating a wearable device and a wearable device are provided. The method includes hierarchically displaying a plurality of icon sets arranged along a plurality of virtual closed loops on a display of the wearable device, obtaining a first input to a bezel ring of the wearable device, determining at least one icon in the plurality of icon sets based on the first input to the bezel ring, and executing a preset function corresponding to the determined at least one icon.