Edible oil, also known as "edible oil", refers to the animal or vegetable oil used in the process of making food, which is liquid at room temperature. Because of the source of raw materials, processing technology, quality and other reasons, the most common edible oil is vegetable oil. There are more kinds of vegetable oils, and the systematic oil-making methods are also recorded, so we have a deeper understanding of the properties, food intake and different functions of various vegetable oils.