A method for converting a computerized briefing file to a PC-less briefing file is disclosed and comprises the steps of: presenting the computerized briefing file via a briefing software, wherein the computerized briefing file has a plurality of pages of briefing data; capturing the plurality of frames of the presented page of briefing data while presenting each page of briefing data, wherein if a difference block is existed between the last frame and the next frame, the difference block being stored in the PC-less file, otherwise, to presenting the next frame; judging whether the pagination of the presented frame is changed or not, if not, continuously capturing, comparing and storing the present page of briefing data, otherwise, capturing, comparing and storing the next page of briefing data; and such steps are not stopped until the last page of briefing data has being done.