As　a　complex　system,　the　strategic　network　has　many　similar　attributes　as　the　natural　ecological　system.　Drawing　lessons　from　theories　and　models　of　ecology,　this　paper　researches　on　eco-relationship　among　enterprises,　and　concludes　that　the　main　eco-relationships　in　the　midst　of　strategic　network　nodes　are　cooperation,　cooperative　competition,　and　co-existence.　At　the　same　time,　according　to　different　node　relationships,　this　paper　builds　up　corresponding　eco-evolutionary　models　for　the　strategic　network.　By　analyzing　the　models,　we　get　the　conditions　under　which　the　strategic　network　nodes　achieve　stable　equilibrium　in　different　inter-node-relationships.　The　achievement　helps　us　to　have　a　better　understanding　of　the　principles　in　the　process　of　strategic　network　evolution,　sharpening　the　overall　competitive　edge　of　the　system.　©2009　IEEE.