The amount of meritocracy system establishment in the government agencies of Ahvaz is assessed in this study. Meritocracy is a system in which the job benefits and situations are given to the people just on the basis of merit and not based on the gender, social class, ethnicity or wealth. Statistical society is the employers of government organizations of Ahvaz (N=10377) and the volume of sample is determined by Morgan and Karjesi sampling (n=384). Also a questionnaire is made in order to collect data which is divided to two sections the first section is used to recognize the degree of meritocracy system establishment with the constant coefficient 0.92 according to the Cronbach Alpha and the second section is used to recognize the of sociological status of responders. In this study the Rough sets theory (RST) was used to reduce data and calculation of it, and then a decision table was constructed and standardized by determining maximum and minimum scores and deciding variable, in the next step compatible and incompatible cases were characterized, and finally the reduction table is formed. Results showed that if sub-system is developing meritorious people are in a low level and meritocratic of organization in the organization is in low level surely. And also meritocratic system of organization is in moderate level if developing meritorious people and keeping meritorious people is in the moderate level surely. Meritocracy system of organization is in high level surely if desiring meritorious is in the high level.