PROBLEM TO BE SOLVED: To provide a grain harvesting system capable of suppressing unevenness of brown rice and obtaining brown rice with a high grade.SOLUTION: A combine harvester (1), a dryer (3), a huller (4) and a measuring classifier (5) are connected by Internet, and information of a lodging rate of grain culms obtained at a harvest time with the combine harvester (1) is sent to the dryer (3), the huller (4) and the measuring classifier (5) via Internet. When a lodging rate of grain culms is less than a prescribed rate, grains threshed with the combine harvester (1) are charged into a first dryer (3A) followed by hot wind-drying for a prescribed time. When a lodging rate of grain culms is equal to or more than a prescribed rate, grains threshed with the combine harvester (1) are charged into a second dryer (3B) followed by ventilation-drying for a prescribed time, and hot wind-drying for a prescribed time.SELECTED DRAWING: Figure 14COPYRIGHT: (C)2020,JPO&INPIT【課題】玄米のばらつきを抑制して等級の高い玄米を得ることができる穀物収穫システムを提供する。【解決手段】コンバイン（１）と、乾燥機（３）と、籾摺機（４）と、計量選別機（５）をインターネットで接続して、コンバイン（１）による収穫時に取得された穀稈の倒伏率の情報を、インターネットを介して、乾燥機（３）と、籾摺機（４）と、計量選別機（５）に送信し、穀稈の倒伏率が所定率未満である場合には、コンバイン（１）で脱穀された穀粒を第１乾燥機（３Ａ）に投入して、所定の時間に亘って熱風乾燥し、穀稈の倒伏率が所定以上である場合には、コンバイン（１）で脱穀された穀粒を第２乾燥機（３Ｂ）に投入して、所定の時間に亘って通風乾燥を行った後に、所定の時間に亘って熱風乾燥を行う。【選択図】図１４
