PROBLEM TO BE SOLVED: To provide an environmental measurement system in which communication between a sensor unit and a reader is not easily disturbed even when a crop exists between the sensor unit and the reader. An environmental measurement system is composed of a linear conductor, has a transmission line for transmitting a signal, and has a sensor for detecting at least one of humidity, temperature, and light illuminance of an ambient environment, and has a transmission line. A linear conductor of a transmission line, including a plurality of sensor units that are directly or indirectly electrically connected to transmit a signal from a sensor to a transmission line and a reader that receives a signal transmitted on the transmission line. At least a part of them is included in the attracting strings of agricultural products. [Selection diagram] Fig. 1【課題】センサユニットとリーダとの間の通信において、センサユニットとリーダとの間に作物が存在する場合にも通信が阻害されにくい環境計測システムを提供する。【解決手段】環境計測システムは、線状の導体からなり、信号を伝送する伝送路と、周囲環境の湿度、温度、光の照度のうち少なくとも１つを検出するセンサを有し、伝送路と直接又は間接に電気的接続され、センサからの信号を伝送路に伝送する、複数のセンサユニットと、伝送路で伝送されてくる信号を受信するリーダと、を備え、伝送路の線状の導体のうち少なくとも一部は、農作物の誘引ヒモに含まれる。【選択図】図１
