As global environmental issues have become aggravated, “Eco” has become a competitive advantage in business because of consumers’ increasing environmental consciousness. However, it is difficult to lead an eco-business to success in both environmental and economic aspects. In order to solve these problems, this paper proposes a methodology that supports ecobusiness planning, in which a design team utilizes the eighteen rules to generate ideas for eco-business based on the investigation of 50 cases of existing ecobusiness, combines these eco-business ideas to generate eco-business model prototypes, and modifies them. This paper also verifies the feasibility of the proposed method through a workshop. The results of the workshop revealed that the method effectively supports especially in generating eco-business ideas by using the eighteen rules, combining ideas with other ideas, and evaluating them from the three perspectives of market attractiveness, company suitability, and environmental consciousness.

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