In recent years, the mass media usually had discussion on the happiness index and little happiness in hand. Salary and vacation became hot issues. At present, emotion and perception of people get more and more attention in work settings. The statistics showed that, in Taiwan, the working hours occupied one-third of a day in average, which also showed the importance of work environment. There are various factors; in five senses, the most important one is visual sense. And the factor directly influence the visual sense is color. This research is divided into two parts to study the impact of color in work environment. The first study (focus on color) aims at the color survey in medical environment; the second study (focus on affect) probes into how the affect of staff, group affect, and supervisor's leadership style influence job satisfaction and job performance.

The respondents of this study are staff and supervisors from Taichung Veterans General Hospital and the public. The questionnaire and matched color specimens were employed to collect relevant data. The result of the first study shows that the ideal image for Taichung Veterans General Hospital is modern sense and intellectuality, which is the collocation of spruce blue and dark grey. This process and method may act as a reference for color plan of work environment in medical industry. The result of the second study shows that the negative affect of staff has a negative influence on job satisfaction, but makes no difference in job performance; Positive group affective tone influences job satisfaction positively, and negative group affective tone influences job satisfaction negatively. Furthermore, the transactional leadership and transformational leadership both exert positive impact on job satisfaction but no impact on job performance.

Keywords: Color, Group Affective Tone, Leadership style, Job satisfaction