1. A method of setting a background screen of a mobile terminal, the method comprising: receiving a selection of a background screen set menu; generating a tag information list by using at least one tag information which classifies images stored in the mobile terminal by related image; displaying the generated tag information list; receiving a selection of at least one tag information from among the displayed tag information list; configuring a background screen with at least one image classified as the at least one selected tag information; receiving a command of storing a new image in the mobile terminal; extracting tag information included in the new image in which the store command is inputted; determining whether the extracted tag information coincides with tag information which is used to configure a present background screen; and including the new image in which the store command is inputted to re-configure the background screen when the extracted tag information coincides with the tag information which is used to configure the present background screen.