Abstract: Under the COVID-19 epidemic,online communication and collaboration has become an important part of offline donation.The technology-driven Internet makes online donation possible.The formation and evolution of fund-raising WeChat group accords with the development process of self-organization.As a result of information and trust difference,the social system of donation group is temporarily far from the balance,and the system in the non-balance is easy to capture the differences(such as multiple subjects,massive donation information,weak organization,etc.),forming the fluctuation that promotes the system balance.In the process of cooperation,the common goal of COVID-19 resistance fluctuation,personal value highlights fluctuation,efficient collaboration fluctuation,group identity fluctuation and new technical tool fluctuation have been revised in the trial and error.Under the action of non-linear mechanism,it is magnified,so as to obtain a breakthrough force to grow into an advantage fluctuation,and to promote the order of fund-raising groups.At the same time,people change the way of using the technology according to the actual needs,which further catalyzes the self-organization of donation to become orderly.This study explores the self-organization process and evolutionary logic of WeChat group network collaboration based on the theory of self-organization and the theoretical perspective of technology availability,combined with the research perspective of social collaboration relationship construction in disaster science.

Key words: self-organization, fund-raising collaboration network, fluctuation, order