Abstract-Network communities have become an emerging channel for human interaction. Network communities create anew from of information service innovation based on massive user collaboration. However, not al network communities may achieve successful collaboration. The ingredients of a network community an its social relationships may influence the development and direction of community evolution and the sustainability of the community over time. We us the theory of Constructionism from the education field to establish an evolutionary model of network communities. The proposed model focuses on social relationships and integration from its participants. It explains the positive social evolution and explores the successful collaboration opportunities within the network community. The power of positive “Forward Evolution” in social communities is an important factor in the sustained development of a network community. Due to the complexity of network community evolution, study uses a case study uses a case study approach to explore the process of evolution and the driving power of each stage. This study focuses on of the ingredients of a network community’s and how its social relationships will help the whole community to achieve continuous forward evolution in every evolution stage. A micro-blog is analyzed for clues to supporting positive social evolutions in social network communities. We also explore and verity the logic of a forward social evolution model in a network community to encourage participants to engage in prosocial behaviors, and achieve successful collaboration. Keywords- Sosial network evolution, Community composition structure; Altruism and Prosocial behaviors.