The description of the problem focus, aim, methodology and structure of the research work provides the introductory part. Subsequently, the specific features and instrumental impact for sustainable development of two types of eco-industrial company networks will be focused: Industrial Recycling Network and Industrial Symbiosis. Next, the evolution model of this specific type of company networks will be shaped by using systems and networks theory ap-proaches in order to gain insight into the development of sustainable inter-company coopera-tion. Accordingly, five important constitutional and conservational conditions for successful eco-industrial network development will be high lighted. The validation of the evolution model and derived networking conditions will be carried out by the analysis of the develop-ment of selected innovative eco-industrial networks/projects located in Europe, America and Asia. The empirical part focuses comprehensively on the installation and management of two established eco-industrial networks, the Recycling Network of Oldenburger Münster-land/Germany and the Recycling Network of (Upper) Styria/Austria. At the beginning, the specific initial situation for eco-industrial networking and the concept of the empirical research will be high lighted. The borders of the two network systems will be described referring to the first constitutional and conservational condition. In the following, the further networking conditions will be addressed by describing the institutionalisation of the inter-company information and knowledge transfer supported by specifically designed Recycling Information Systems, the introduction of inter-company recycling systems for selected resi-dues fostering the confidence into the network systems and the service model of a networking recycling agency for the Oldenburger Münsterland Region to assist the strategic and autopoe-tic network development. Finally, a continuative resume will be provided.