The number of applications and the significance of ultrapure water are increasing over time in both traditional and high-tech industries. For ultrapure water treatment and production, two important types of equipments are the green technology with Electrodeionization modules (EDI), and the traditional ion exchange resins with Mixed Beds (MB). Unfortunately, it is a concern that the highly polluting MB technology produces a large volume of waste-water during the regeneration process, but still owns around 90% market share of all ultrapure water systems. By contrast, although EDI, a high-tech green product of the latest generation, has excellent market advantages and a promising future of totally replacing MB, it grabs only around 10% market share as of 2010. Perhaps, the technology and timing for EDI to be widely applied are still premature. It is also likely that most industrial consumers do not fully understand the real value and deep impact of EDI, and cling to MB under the conventional cost-price consideration. However, it is a global trend to be environmentally friendly. For example, in recent years the world¡¦s major automobile companies have invested in developing and manufacturing hybrid/electric vehicles that are equally functional yet more costly than traditional cars. Moreover, governments counteract general consumers¡¦ preference for low-price products by imposing more stringent standards for cars¡¦ emissions and energy consumptions with the aid of new laws and subsidies. If there is a lesson to be learned here, isn¡¦t EDI to the ultrapure water industry what hybrid/electric cars are to the automobile industry in terms of their developing trends and values? This thesis will examine a specific case, S company, which manufactures EDI. Through the analysis of the company, advantages of its products, and potential opportunities in its business environment, empirically it can be shown that EDI will inevitably become the mainstream in the future market by gradually replacing all traditional MB. Hopefully such an empirical conclusion would inspire and educate industrial manufacturers to make their future choices between EDI and traditional MB based not only on the operating efficiency, but also on which technology contributes more to environmental protection and earth sustainability during the development of an enterprise. It is also of hope that the perspective on system designs and usages could be more objective and unbiased. For instance, instead of always chasing low costs as the first priority in the pursuit of profits and development, enterprises could take into account social responsibilities, such as environment protection, energy conservation, and carbon reduction, and become pioneers in carbon footprint reduction.