After the main-board industry gone through all the growing up by a wide margin in 1997~1999, it has being changed from high profit industry into mature one, entering to so called Post-PC Era. Among the environment of competition aggressive industry, main-board factory owners master the core of competition in research and production. By way of integrating computer shell and power provider industry horizontally it results in new Bare-Bone System computer market and launches separate industry hostility. This research applies the analytic structure of data envelopment analysis (DEA) to probe into the operational patterns and strategic analysis about Bare-Bone System market among Taiwan area's factories in Post-PC Era in order to address feasibility studies and suggestions by according to the varied operating strategies and particularly of factories circumstances. There are 8 factories capable to produce Bare-Bone System to be this research's targets and in accordance with public financial statements such as balance sheets, income statements, and cash flow sheets, etc. These have been used as analysis data of DEA. Consequently, two influential components, "company scale" and "profitability" form two dimensions and are used to classify the targeted companies into four groups of similar effects: 1. Leader, 2. Challenger, 3. Follower, and 4. Nichers. Furthermore, based on the analysis, the relationships between market and industry are investigated. It suggests relevant factories to develop brand images, develop new distribution channels, enhance professional abilities, and seek for the strategies of superior value-added products, etc. Moreover, future directions of follow-up researches are provided.