The present invention relates to an information reading device capable of performing corresponding processing according to information reading sequence. The present invention comprises an image reading unit for acquiring images, a processing unit for acquiring corresponding information codes according to the images acquired by the image reading unit, a storage unit for storing an information codegroup formed by a plurality of information codes in a set sequence, a feedback device which is controlled by the processing unit to output feedback information to users for prompt. When the information codes are acquired according to the set sequence, the processing unit generates a flow position capable of representing the storage positions of the information codes in the set sequence of the information group, and records the flow position; after acquiring a new information code again, the processing unit judges whether the information code acquired again is identical to the information codewhich is correspondingly stored at a next-place position in the set sequence of the flow position in the information group according to flow positions.