An image forming apparatus and a document management method thereof. A document management method of an image forming apparatus which includes an image scanner to scan a document and generate a scanned image, the method includes generating the scanned image by scanning a document including a bar code, determining whether to perform an optical character recognition (OCR) on the scanned image by using bar code information of the generated scanned image, extracting character information of the document by performing the OCR with respect to the scanned image according to the determination result, and setting a file name by using at least one of the bar code information and the extracted character information and storing the scanned image. The apparatus and method set a file name of a scanned document to identify the document without an additional input.