Electronic document security ensuring system and electronic document security ensuring method

The invention relates to an electronic document security ensuring system and an electronic document security ensuring method. The electronic document security ensuring system is based on a client server system, and performs user permission management by coordination of a client and a server, wherein the server comprises a document server module, a certificate management service module, a document log service module, a document distribution service module, and a user role and permission management service module; and the client comprises an electronic document editor module and a client configuration interface module. The electronic document security ensuring method comprises the following steps: 1) providing a unified security verification mode for different document formats of the client; 2) acquiring user operating information by operating information interception technology, and shielding corresponding unauthorized operation according to user permission; and 3) separating functions of document storage, role management, permission control and log management, and constructing an electronic document server end based on Web. The system and the method can prevent the information leakage in the form of electronic document and provide high security guarantee for electronic office.