Disclosed are a mobile terminal and controlling method thereof, by which saved image data can be effectively searched. The present invention includes a memory configured to store at least one image data, a touchscreen, and a controller outputting a thumbnail list for the stored image data on a 1st scale through the touchscreen, the controller receiving a scroll input to the outputted thumbnail list plural times, the controller, if the scroll input received plural times meets a scale change condition, changing the 1st scale of the outputted thumbnail list into a 2nd scale.