With the development of IT, one strands of informationize tide big and powerful are having swept the globe, already more and more unadaptable informationize the tradition framework of organization development. Informationize level at present, medium-sized and small enterprises in the homeland common low, the increase pattern being tradition as before , equipment , informationize level , mode of production comparatively backward. Informationize already have become enterprise managerial innovation, strengthen competitiveness , adapt to the necessity choice that the times reforms. The construction the medium-sized and small enterprises though a lot of realizing the informationize significance to enterprise development, but small and medium enterprise is carried out informationize still is beset with difficulties. And the main body of a book has been set forth being hit by the agent and way that peanuts organization reforms under informationize environment, behaviour having studied enterprise organization transforms from theory and the demonstration angle, have answered the cause that information ear enterprise organization reforms and how to have reformed a problem, how to carry out effective organization on medium-sized and small enterprises in the information ear transforming having done analysis.