Purpose: This study has been designed to evaluate occupational health services on workers with hypertension Method: Study participants were 108 workers having a diagnosed hypertension. The instrument used for this study was the questionnaire developed by Cho(1998). Analysis of the data was done with SPSS Win 10.0 for descriptive statistics, Correlation coefficient. Results: 1. The mean score of process domain was $3.77pm.43$ The score of process domains were usefulness of health management$(3.98pm.49)$, education or counselling$(3.87pm.53)$, follow up in medical examination$(3.79pm.58)$, usefulness of providing materials$(3.53pm.62)$, perception of medical examination $(3.37pm.80)$ 2. The mean score of outcome domain was $3.47 pm.44$ The score of outcome domains were obstructiveness of social life$(3.90pm.78)$, habits of living $(3.41pm.76)$, blood pressure change $(3.25pm.81)$, perception of seriousness$(3.02pm.88)$. 3. Blood pressure change was significant correlated with education or counselling(r=.31) and usefulness of providing materials(r=.28).