Market mechanism does not always work perfectly in the real world; this imperfectness, in turn, leads to inefficiencies in consumption and production, and ultimately, results in not so satisfied consumers and businesses suffering from less than optimal profitability. The four guidelines for dealing with desires, taught by Venerable Sheng Yen, provide an economics-principle- compatible view and a practically-viable Buddhist way to deal with the above-mentioned problems and to improve market efficiency. Consumers who follow the four guidelines are less likely to pursue goods which can't be acquired or shouldn't be acquired, and they relatively prefer goods which are environmentally friendly and hence should be acquired. Moreover, through conscientiously reflecting on the concepts of needs and wants, those who follow the guidelines will spontaneously set an adequate level of overall consumption. Consequently, the relationship between their demand and income is weaker than that of the general public, and the price elasticity of their demand for normal goods is also relatively smaller. Thus, consumers who follow the four guidelines have a more stable demand and are more willing to pay higher prices for environmentally friendly normal goods. As a result, if the population of such consumers is sufficient, not only can the firms producing these goods better utilize their production capacity, but also can they become more profitable, and more willing to adopt environmentally friendly production process. This paper concludes that by following and applying the four guidelines for dealing with desires, taught by Venerable Sheng Yen, market would be more efficient, as manifested in more satisfied consumers, more stable consumptions, and more efficient, more environmentally friendly production.