The invention provides a patent on-line business processing system. The patent on-line business processing system comprises a network module, a business requesting module, a business generation module, a business writing module, a business auditing module, a business confirmation module, an aid application module, a privilege management module, and a database module, and the business requesting module, the business generation module, the business writing module, the business auditing module, the business confirmation module, the aid application module, the privilege management module, and the database module are respectively connected with the network module. According to the patent on-line business processing system, a high-efficiency, convenient, and informational management network between clients, agencies, and the Intellectual Property Office is established, and the problem of low efficiency of paper pieces is solved.