Global warming and environmental problems raise people's environmental concerns and increase their environmental responsibility in their buying. Countries all over the world are increasingly emphasizing environmental conservation matters. Green consumers are those who are aware of and interested in environmental issues. They support businesses that run in environmentally friendly ways. In addition, green consumers are also concerned about how green the products they bought are. Green products are products that are non-toxic, made from recycled materials, or minimally packaged. In general, green products are known as ecological products or environmentally friendly products that impact less on the environment. The goal of green marketing is bringing environment issue into marketing. If we can make consumers consider that information of environmental protection during their decision process, we can push companies to produce more environmentally friendly products. Although the tourism and hospitality industry is also referred to as the non-factory-made industry, companies are still trying hard toward the goal of sustainable development. In Taiwan, the government took several ways to encourage sustainability development in the industry. For example, the Environmental Protection Administration (EPA) held a reward program that customers could earn "green points" after dinning at environmentally friendly restaurants.