The invention discloses a paper format detecting system and belongs to the technical field of detection. The paper format detecting system comprises the following steps that firstly, a file is read; secondly, whether the file is a package or not is judged, if yes, the third step is executed, and if not, a word document is read, and the fourth step is executed; thirdly, the file is decompressed, a thread is established, and the word document is read within the thread; fourthly, content logic is detected, and if errors exist, the document is added to a wrong document report; fifthly, the format is detected, and if errors exist, the document is added to the wrong document report; sixthly, pictures are detected, and if errors exist, the document is added to the wrong document report; seventhly, detection is ended.