Since Intergovernmental Panel on Climate Change (IPCC) warned that only 8 years were left to stop disaster from climate change caused by fossil energy, various policies for reduction of green-house gas have been arranged and strong measures to reduce green house gas are being taken globally, as well. Renewable energy has been regarded as a key for resolving climate change problem and green-house gas reduction, and industry for renewable energy has been expanded expecially in developed countries, accordingly. Developed countries are leading renewable energy industry, using government policy for technology development, government support for facilities and finance, leading to monopoly and preemption of technology related with renewable energy. RPS to be implemented in 2012 is regarded as a turning point to alleviate burdens on government budget for long-term business. Sales of renewable energy certificate between electricity supplier and power company and power generating business caused by such policy change is to be analyzed in terms of photovoltaic market in this study for providing opportunities to take advantage of RPS.