瞭解食品需求結構是評估農業政策的一項重要經濟分析。本文利用糧食平衡表和 台灣農產都市零售價格資料，運用需求體系分析法，估測六類總合食品需求彈性矩陣。實証 估測結果顯示，自身價格彈性除主食類為正值，不符合預期外，蔬菜類、水果類、肉類、乳 蛋類，和其它類等五類食品都小於一，皆屬於缺乏彈性。支出彈性估測值指出，主食類為負 值，蔬菜類和其它類屬於正值但小於一；水果類、肉類，和乳蛋類都大於一。此外，產品間 交叉彈性值大都是負值，代表著六類食品間大都具有互補關係。

　　　　　Understanding food demand structure is critical for the economic analysis of various agricultural policies. Two PIGLOG type demand systems are employed to estimate demand elasticities of six aggregate food groups using the sample data obtained from food balanced sheets and urban retail prices of food commodities. The empirical results show that the estimated own- prices elasticities are all inelastic for aggregate food groups except staple food, being positive, with unexpected sign. The estimated expenditure elasticities indicate that staple food is negative; vegetable and others are both positive but less than one; fruits, meats, and dairy products are all greater than one. In addition, most of the estimated cross-prices elasticities are negative, representing among six aggregate food groups being complementary.