This study investigated the effects that corporate social responsibility (CSR) had on the credibility and image of a food corporation by analyzing the purchasing intention and food purchases of consumers. This analysis was undertaken in an attempt to establish a marketing strategy that meets consumer demands, and the results showed that all CSR activities undertaken by the food corporation had a positive effect on the reliability and image of the corporation and on consumers' purchase intention. The results indicate that the ethical aspect of the CSR activities had the greatest effect while their charitable aspect had the least effect on the reliability and purchase intention of the customers regarding the food corporation. Thus, it appears that establishing of suitable ethical doctrines and guidelines for corporate management by food corporation is effective in emphasizing the ethical aspects of their policies through transparent management by means of fair trade.