1. A method of searching for content among contents stored in a touch screen device, the method comprising: displaying N number of representative contents among the stored contents; selecting at least one of first content and second content from the displayed N number of representative contents; when both the first content and the second content are selected, extracting and displaying N number of representative contents existing between the first content and the second content; when one of the first content and the second content is selected, sequentially extracting and displaying contents that belong to upper or lower levels of the selected content; and adjusting an interval of searching for the contents by repeating the extracting and displaying whenever at least one of the first content and the second content is selected from the displayed N number of representative contents, wherein the N number of representative contents are generated into N intervals among the stored contents, and wherein N is the number of contents simultaneously displayable on the touch screen, wherein in response to a generated selection signal corresponding to a drag operation in a first direction on a displayed first content section, upper level contents of the first content are displayed; and in response to the generated selection signal corresponding to a drag operation in a second direction on the displayed first content section, lower level contents of the first content are displayed.