In case there is no image file with an event name in a memory card when a digital camera is turned on the first time on the day, an asking sentence asks whether to create a new event name or not. When “Yes” is selected, event tag data showing “Event 1” is applied to an image file. When “No” is selected, event tag data showing “No event” is applied to an image file. In case there is an image file of “Event n” in the memory card, a selection screen is displayed to select one of options, which are to apply a new event name “Event n+1”, to apply the existing event name “Event n” and to apply no event name. In the second or later turn on of the digital camera, the event name selected in the first turn on is automatically applied to the event tag data.