This study was carried out to analyze of the cause of button mushroom production decrease of Gyoengbukprovince. In 1978, Agaricus bisporus was produced 48,000 ton and exported more than $50 millions. But since 2000, Domesticproduction of button mushroom was decreased by 70%, and button mushroom farm was also decreased by 37%. Cultivationarea was increased by 6%, but Gyeongbuk Province was decreased by 30%. Especially, Production per 3.3ߊ was dramaticallydecreased more than half. There were several causes such as rising labor and material cost, climate changes, and aging ofmushroom cultivation farmers. And there was no effort to develop of domestic button mushroom cultivation equipments. One ofthe main reasons for this reduction was supplied to low quality of button mushroom compost to the farm.