The self-reported job burnout syndrome has been long challenged by Ergonomists due to the huge potential research bias laying in the attribution and causality on workload perception and perceived anxiety levels. The present research attempts to embody the job burnout through the theory of psychological entropy and further proposes a method to quantitatively measure it. There exists a method of adopting a group-based consensus probability from the sample set in the previous literatures. The present research follows the theoretical principle of information entropy and psychology entropy and suggests a subjective probability to refine the measurement issue. Result of empirical data analysis shows that the suggested subjective probability fits the original dataset best and pass the sensitivity test.