This paper, based on case study method of Taiwan¡¦s OSS Firm - Potix Technology Co., Ltd., is conducted in one organization through literature reviewed, documentations collected and analysed, and the researchers¡¦ observations and participation involved. The paper conceptually develops a model of micro-entrepreneurships with substantial literatures that support the six dimensions including entrepreneurs/teams, opportunities, resources, environment, process, and performance. This paper building on a framework of business models including product innovation, customer relationship, infrastructure management, financial aspects. As a result, the researchers provide the basis for further research upon the management and advancement of micro-entrepreneurships. The contribution of this study: 1.One organization through literature reviewed of micro-enterprise, open source, business models. 2.To use a real business case as an example to analyze the open-source software company that Micro-entrepreneurships issues involved. 3.Proposed "opportunities - value" of the bull¡¦s-eye diagram concept. 4.One systematic organization of the case study for micro-entrepreneurship development course and characteristics of various stages, copyright type, business model.