An apparatus for displaying and storing scan images includes an image capturing module, a processor module and a display module. The image capturing module captures N images of N pages of a document and generates corresponding N sets of image data, where N is a positive integer greater than 2. The processor module, coupled to the image capturing module, controls the image capturing module, processes the N sets of image data and generates corresponding storage image data and M representation images of M of the N images, where M is a positive integer less than N. The display module, coupled to the processor module, displays the M representation images after the storage image data are stored in a memory device connected to the apparatus. A method for displaying and storing the scan images is also disclosed.