Based on surveys of the eating habits of people living in the north coast of Taiwan, the aim of this paper was to find out the amount of daily food consumption. The foods were classified into five main categories, namely, grains, vegetables, fruits, meat, and sea food. According to the ways of calculation, the amounts of consumption were divided into three types, i.e. the amount of distribution, the amount of purchase, and the amount of eaten food. The amount of distribution was the total food divided by the total population, the amount of purchase was the quantity of food purchased by cash, and the amount of eaten food was the quantity of food eaten by people. The relationships among these three types were discussed in this paper.