在高度競爭的社會裡，工作壓力已伴隨我們生活當中，日積月累的情況下導致不正常的生理反應、工作態度、甚至疾病。在合理範圍內工作壓力有助於個人成長，過度壓力累積則將導致負面結果，因此能掌握本身工作壓力累積之程度，則將有助於跨越工作障礙、減少負面生理反應。
人體中有許多的生理訊息可以藉由醫學電子儀表來顯示其變化，本研究利用心電圖(ECG)、皮膚導電(EDA)、末梢血流(PPG)取得生理訊息，來評估潛在工作壓力累積之程度。實驗由壓力量表分出無壓力的族群，給予每天週期性的任務，透過嵌入式系統，擷取和記錄生理數據於SD卡或串列埠直接送至電腦端，在一天工作任務結束後，利用Matlab和LabVIEW分析生理訊號，取出特徵值，透過Fuzzy整合三種生理參數，找出壓力累積代表性生理指標。
最後藉由一開始壓力量表分出的壓力族群，於正常工作中配帶此可攜式嵌入式系統，由本系統量測其累積壓力定義值，並與壓力量表分數做相關性比較，驗證系統的準確度。

The working stress occurred daily in the modern highly-competed society. If the stress is accumulated over a long period, it may cause abnormal physiological reaction, lazy working attitude, even fall ill. In the range of normal working stress, it is helpful to individual growth. On the other hand, it will lead the negative results. If we can understand the degree of working stress, we may across the barrier of work more easily, even can reduce the negative physiological responses caused by the accumulated stress.
Many physiological information can be detected through the medical electronic instruments. The purpose of this study is using electrocardiogram (ECG), skin conductance (EDA) and peripheral blood flow (PPG) to obtain physiological information for assessing the level of working stress accumulation. The subjects were divided into two groups with or without working stress by PSS. For recording the effect of daily periodical task, we use an embedded system to acquire all the data of bio-signals and record in SD card or send them to the personal computer via a serial port. And then we evaluate the physiological parameter by Matlab and LabVIEW and get characteristic values in daily task. Finally, we integrate three physiological parameters through Fuzzy set to obtain the bio-indicators which represent the degree of stress accumulation.

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