B/S architecture, which is the key for Office Automation System to meet the requirements of universitiesÂ daily work, is important for the design and implementation of universitiesÂ office automation system. For the research and exploration in this field, firstly, system architecture design is the foundation of discussion, mainly combined with MVC and three-tier model from which overall B/S architecture of system is initially explored. Secondly, analysis and design of cooperative office automation system are studied in detail though three methods including system use-case analysis, state diagram design and system dataflow analysis to support the normal running of universitiesÂ office automation system. Thirdly, the thesis researches the main functions of this system, such as system management, workflow management system, document circulation system and database design through system function design, showing the integrity of B/S architecture in universitiesÂ office automation system. Finally, for writing the test cases, stress testing and software testing are discussed to ensure stability and reliability of this systemÂs architecture. Above is the main idea of this research, which also shows the main content and specific goal of this study.