The invention relates to an OA intelligent office 
system and a management method thereof. The 
system comprises a 
system function module responsible for the 
system code settlement, the role 
authorization management service and the message notification service, a working module responsible for the outgoing message management, the incoming 
massage management, the basic settlement, the to-be-done job settlement, the job inquiry, the process log, the overtime statistics and the 
project completion data filing, and a system management module responsible for the administrative office settlement, the 
information exchange settlement, the timed 
task management, the 
workflow settlement and the organization mechanism settlement. The working module acquires the usage 
authorization information, the login information and the message reminding of a user by means of the system function module. The system management module acquires the data of the system 
authorization management, the settlement data of the 
workflow, the settlement data of roles in the company of the above user and the settlement data of document templates by means of the system function module. The working module acquires the operating authorization of incoming massages and outgoing messages, the job inquiry authorization and the division basic data of 
project completion items by means of the system management module. According to the invention, the 
electronic signature technology, the 
project management service management and the OA office flow function are integrated.