In a market economy in which a farmer can buy and sell inputs freely in order to maximize his(or her) farm income, individual farm's productivity and efficiency could be the more important barometer of the economy's agricultural state than the average productivity of whole agriculture. In the paper, the input productivity and production efficiency of individual farms are measured and compared with the average productivity of whole agriculture. The input productivity of a farm is calculated by dividing farm income with input cost. And the production efficiency of a farm is measured and analysed using DEA method and Malmquist index. The results show that a micro level analysis on the input productivity and production efficiency of farms can help us understanding the change of farm production structure.