SaaS the pattern and discusses in accountant's application - - discusses the net online supervisory service take the friend as the example abstract: SaaS is Software as a Service (software is service) the abbreviation, this kind provides through the network for the user rents software's pattern, will become in the future 10 year software industry development new direction. Along with SaaS this kind of software application pattern promotion and development, regardless of from tradition management software manufacturer's Jin Die, uses the friend, the telecommunication and the motion operator, as well as have devoted to the small and medium-sized enterprise ERP market business power and the golden abacus, SaaS already became the topic which industry in the enterprise most craves. But along with IBM, Microsoft, HP and so on international giant announced one after another enters the SaaS area of technology, may foresee, belongs to the SaaS time soon to arrive! In the past accountant often is regarded as is a science, a tool, actually accountant is one kind of service. Along with Internet's fast development, Internet the profession will also bring the revolutionary to accountant influence. Its engineering factor, the network environment and professional service ability already had, the widespread user's needs will be promote this revolutionary the realistic power, the lead who SaaS will become this transformation, SaaS have the huge influence and the transformation to accounting event processing and the supervisory work. key word: Accountant SaaS pattern online software integration application