An image photographing device displays a preview panoramic image and data regarding moving velocity and direction of the image photographing device during panorama photographing in real time. The image photographing device includes a photographing unit to photograph a plurality of images, an image processing unit to convert the images photographed by the photographing unit into preview image data and to generate preview panorama data using the preview image data, and a display unit to simultaneously output a screen to display the preview image data, a screen to display a process of synthesizing the preview panorama data, a moving direction display screen indicating a relative difference between the moving direction of the image photographing device and a predetermined reference direction, and a moving velocity display screen indicating a relative difference between the moving velocity of the image photographing device and a predetermined reference velocity.