The relationship between organization justice and organization commitment have be researched by many scholars. However, researchers have never considered the influence of different organization situations to the relationship. According to some researchers in practice, pay institute is considered as a situation variance to analyze the effect to the relationship between organization justice and organization commitment in the pay institute perception of employment. This theme has steps: first step, we include the common conception of designs, goal, and polices of pay institute to define the pay institute perception with reliability, competence, incentive and feedback and develop a valid questionnaire; Second step, we analyze the effect in the relationship between organization justice and organization commitment to conclude that the pay institute perception of employment is an important adjustment variance. We also proof organization variance does affect the merit, which is indicated by theme of Szilagui and Wallance(1983).