1. A digital pictorial book system comprising: an image capturing module for capturing an image; a main object selecting module for selecting a main object out of the image; an inclination measuring module for measuring inclination of said image capturing module in a vertical direction; and a name searching module for searching for a name of the main object in an image database, which stores a name of an object corresponded to a feature of the object, on the basis of the main object selected by said main object selecting module and the inclination measured by said inclination measuring module.