Cooking oils, which are used extensively in daily life, are food products of plant and animal origin that affect the taste and quality of the meal. These products may have different chemical characteristics due to the materials and methods used in the production process. These chemical characteristics directly affect human health and natural life. Cooking oils with harmful properties can have very negative consequences for human health. In addition, cooking oils produced without considering environmental conditions can cause great ecological damage both during production and as waste product after consumption. In this study, 9 different cooking oils, which are used extensively in the food sector, were analyzed using a hierarchical weighting model in terms of ethical criteria and an ideal cooking oil brand was tried to be determined among them. Thanks to analysis study, it has been aimed to establish a decision support system for the selection of cooking oil for companies and individuals in the food sector.