A document management system includes a memory and a controller. The memory stores access privilege information configured to define, for each display style of a document element displayed in an electronic document, privileges of users or user groups regarding access to a document element having a display style. In response to a request from a user to perform an operation on a document element in an electronic document, the controller controls whether the operation is executed or not on the document element, using the access privilege information stored in the memory, in accordance with a privilege among privileges of the users or user groups for a display style of the document element, the privilege being a privilege of the user or a user group to which the user belongs.