We make a fully literature reviews regarding to the virtual organization by which we deduces a conclusion that the research of virtual organization concentrates construction on the following fields: computer network, relationship network, enterprise function, transaction method, and product content. According empirical cases on which we obtain eight propositions because the business attributes with respect to the virtualization have been analyzed. Then an integrated virtual business definition has been concluded that is a business use a general temple or specific unique network as information exchange, tightly corporation relationship, partial business outsourcing, simple transaction method, to complete the digital instant products as majority. This study would be a good reference for the reengineering and the evaluation of the virtual level, in the future, in addition to clear understand the whole deduction picture of virtual organization.