PROBLEM TO BE SOLVED: To provide environment control apparatus for use in agricultural houses which reduce the labor for setting up a user's target temperature and enable proper setting of temperature in an agricultural house even for the user having little plant growth knowledge and programming grounding.SOLUTION: The present invention has, at least, a solar radiation amount measuring means for measuring the amount of solar radiation, a CO2 concentration measuring means for measuring CO2 concentration, as well as an input means for inputting a target maximum temperature, a target minimum temperature, and one or a plurality of target temperature calculation coefficients, a target temperature calculation means calculating a target temperature in an agricultural house using a correlation among a solar radiation amount value, a CO2 concentration value, and a target temperature based on a target temperature calculation coefficient according to the target maximum temperature, the target minimum temperature, the solar radiation amount value, and the CO2 concentration value.SELECTED DRAWING: Figure 1【課題】ユーザーの目標温度を設定する労力を低減し、植物生育知識およびプログラミングの素養の少ないユーザーでも適正な農業ハウス内温度設定を可能にする農業用ハウス内環境制御装置を提供すること。【解決手段】少なくとも、日射量を測定する日射量測定手段と、CO2濃度を測定するCO2濃度測定手段と、目標最高温度と目標最低温度と１つないしは複数の目標温度算出係数を入力する入力手段を有し、目標温度算出手段は目標最高温度と目標最低温度と日射量値とCO2濃度値に応じた目標温度算出係数に基づく日射量値とCO2濃度値と目標温度間の相関を用いて農業用ハウス内の目標温度を算出する【選択図】 図１
