Abstract: An image forming device adjusts a paper feeding speed according to a type of a fed paper. The image forming device includes an interface part to receive and transmit data from and to a user terminal, a storage part to store print data transmitted via the interface part from the user terminal, a feeding control part to control a feeding mechanism to feed a sheet of paper to print the print data according to a predetermined feeding speed depending on a type of the fed paper, and a print part to print the print data on the fed paper. Accordingly, a paper can be fed according to the paper feeding speed selected or adjusted by a user, and can be printed such that a paper jam is prevented with respect to various kinds of papers, and therefore, both printing speed and quality can be improved.