A document checking system includes a processor configured to analyze a result of checking a document, and a memory configured to store a database that holds the analyzed check result. The processor is configured to: acquire checked documents that are generated by plural checkers individually checking the document; extract (i) notes added by the checkers to the checked documents and (ii) marks specifying descriptions related to the notes in the checked documents; when check information including information on the note and the mark on each extracted checked document satisfies a predetermined condition, determine a check result and register the determined check result in the database; and when the check information does not satisfy the condition, notify an administrator of the check result, determine the check result based on a determination result made by the administrator and register the determined check result in the database.