This study analyzed the main effect on organizational commitment of organizational justice factors and the moderating effects of appraisal instrumentality on the relationship of three justice factors(distributive Justice, procedural justice, and interactional justice) and organizational commitment. Hypotheses were tested by surveying 468 employees of four universities. This results suggest following important implications. First, all three justice factors are essential to enhance the level of organizational commitment in appraisal about employee of university. Second, especially, the moderating effect of appraisal instrument has been found only between distributive justice and organization commitment.