近代工業高度發展為人們帶來便利的生活以及經濟的成長，但隨之所衍生出來的環境問題也影響著人們的健康，最顯而易見的是水源以及空氣品質，環境污染直接或間接地影響著人們的健康與生活。隨著生活品質的改善，人們也逐漸重視周遭環境品質以及身體健康狀況，而科技的進步讓一些生理訊號還有環境監測的數據更容易取得。現在的體重計可以測量體脂率、肌肉含量。而血壓、心率、血糖等與心血管疾病相關的生理訊號，也有相關的儀器可以測量。尤其穿戴式裝置讓心率的量測更為普及，幫助人們即時的測量自己的心率，即時監測心率狀況並提前預警或是提醒使用者異常的心率起伏。近年來由於空氣汙染嚴重，越來越多人購買空氣清淨機來過濾室內的空氣以提升空氣品質，而有些空氣清淨機也具備監測空氣品質的功能，依據空氣品質來調整濾淨空氣的效率。本論文利用 Arduino 收集 MQ-135 空氣品質檢測感測器與光體積變化描記圖法(Photoplethysmography，PPG)的訊號，並利用簡單的訊號處理計算心率，架構一個可以收集環境空氣品質指標以及受試者心率的系統，在室外以及室內進行資料收集，再分析空氣品質與心率的相關性。此系統可以應用在空氣汙染風險的工作環境，作為工作者監測工作環境的空氣品質以及自身心率的工具，如高濃度粉塵，或是有機揮發氣體濃度較高的工作環境，一來可以監測空氣品質是否有達到危害人體的程度，二來是透過監測工作者的心率來得知工作者是否在該工作環境中感到身體不適而提前預警工作者該暫時離開工作休息或是開啟空氣清淨系統淨化工作環境。

With the improvement of the quality of life, people are paying more and more attention to the quality of the surrounding environment and physical health. The advancement of technology has made it easier to obtain some physiological signals and environmental monitoring data. There are also related instruments can measure the blood pressure, heart rate, blood sugar and other physiological signals related to cardiovascular disease.
The wearable devices make heart rate measurement more popular, helping people measure their heart rate in real time, monitor heart rate conditions in real time, and warn users in advance or remind users of abnormal heart rate fluctuations. In recent years, some air purifiers also have the function of monitoring air quality and adjust the efficiency of air filtration according to air quality. This paper uses Arduino to collect the signals of the MQ-135 air quality detection sensor and Photoplethysmography (PPG), and then uses simple signal processing to calculate the heart rate and constructs a system that can collect ambient air quality indicators and subject's heart rate and collects data outdoors and indoors, and then analyzes the correlation between air quality and heart rate. This system can be used in working environments with risk of air pollution, as a tool for workers to monitor the air quality of the working environment and their own heart rate and warn the worker in advance.

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