A paper transfer control method for an image forming device having a plurality of paper feeding cassettes for storing paper sheets; a pickup roller for picking up a paper sheet from one of the plurality of paper feeding cassettes to load the picked up paper on a paper transfer path; a transfer roller for feeding the loaded paper sheet; an image forming unit having a photosensitive medium for forming an image on the paper sheet; a driving motor for driving the photosensitive medium, the transfer roller and the pickup roller; and a plurality of sensors for sensing whether the paper sheet is transferred. The method includes: selecting a paper feeding cassette which picks up a paper sheet according to a received printing command; transmitting a linear-velocity control command to the driving motor, the linear-velocity control command based on a paper transfer path of the selected paper feeding cassette; and picking up the paper sheet, and transferring the picked up paper along the paper transfer path.