This study was carried out to provide standardization for mushroom production of high quality at farmhouse. Thestandardization does much to improve merchantable quality, distribution efficiency and fair dealings by shipping of the standardagricultural products. Therefore, modification of these standards is required to fit farmhouse situations. The standardization forproduction of Pleurotus eryngii of high quality follows like this. A grades were above 90 g at average weight, more 50 mm at stipethick, 1.6~1.7 at stipe length/stipe thick rate and 1.1~1.2 at pileus diameter/stipe thick ratio. B grades were more 45 g at averageweight, above 40 mm at stipe thick, 1.8~1.9 at stipe length/stipe thick ratio and 1.2~1.4 at pileus diameter/stipe thick ratio.