Set-aside program for rice in Korea was a pilot project for three years from 2003 to 2005 to reduce rice production. The program was planed to reduce 130 thousand tons at a cost of 81 billion won(i.e., 623 thousand won per ton). Although this program could be considered cheaper than a special disposition like foreign aid of which cost 1,806 thousand won per ton, it should be evaluated how much acreage at less-favored areas could be decreased without the program. The forecasting results using the KREI-ASMO 2002 model which consists of data prior to set-aside program showed that 47~68% percent of the set-aside acreage would be pure effect. This paper measures the efficiency of four alternative program to reduce the excess supply. The rank of efficiency was 1) set-aside program 2) deficiency payment for switching rice acreage to soybean 3) land bank system 4) special disposition. And policy mixing, eg. set-aside program and deficiency payment for switching rice acreage to soybean is estimated to be the most efficient.