The primary purpose of this study is to present the importance and necessity of the environmentally-friendly fishery. We estimates the economic value by dividing the environmental conservation functions of environmentally-friendly fishery into maintaining bio-diversity, improving the quality of water, and reducing greenhouse gas. The estimations are implemented by contingent valuation method(CVM). The WTP is estimated to be 2,219 won for maintaining bio-diversity, 2,342 won for improving the quality of water, and 2,474 won for reducing the greenhouse gas. For the group of people who are well aware of these functions, the amount of WTP is estimated to be 400 to 1,200 won higher than the other group.