PROBLEM TO BE SOLVED: To provide a control system and a control method of environment inside an agricultural greenhouse which are capable of optimally and highly accurately controlling cultivation environment in a greenhouse based on all kinds of environmental information inside/outside a greenhouse.SOLUTION: A control system 10 of environment inside an agricultural greenhouse of the present invention is constituted by including sensors 20 outside the greenhouse, sensors 30 inside the greenhouse, environmental adjustment devices 40, and an environmental control device 50. The environmental control device 50 comprises: an input part 51 to which at least a measurement value of environmental information inside/outside the greenhouse and a state of the environmental adjustment devices 40 is input； a storage part 52 in which the measurement value of environmental information inside/outside the greenhouse and the state of the environmental adjustment devices 40 by every prescribed time are accumulated in time series； an environmental information determination part 53 which determines the presence of changes of the measurement value of environmental information inside/outside the greenhouse； a searching part 54 which searches for past measurement values of environmental information inside/outside the greenhouse； an environmental control information setting part 55 which sets environmental control information on the environmental adjustment devices 40； an output part 56 which sends out the environmental control information to the environmental adjustment devices 40.SELECTED DRAWING: Figure 1【課題】 ハウス外内のあらゆる環境情報から、ハウス内の栽培環境を最適且つ高精度に制御可能な農業用ハウス内環境制御システム及び制御方法を提供することを目的とする。【解決手段】 本発明の農業用ハウス内環境制御システム１０は、ハウス外センサ２０と、ハウス内センサ３０と、環境調節装置４０と、環境制御装置５０とを含んで構成され、環境制御装置５０が、少なくともハウス外内環境情報測定値及び環境調節装置４０の状態が入力される入力部５１と、所定時間毎のハウス外内環境情報測定値及び環境調節装置４０の状態が時系列で蓄積される記憶部５２と、ハウス外内環境情報測定値の変化の有無を判定する環境情報判定部５３と、過去のハウス外内環境情報測定値を検索する検索部５４と、環境調節装置４０の環境制御情報を設定する環境制御情報設定部５５と、環境制御情報を環境調節装置４０へ送出する出力部５６と、を備えること
