The Government investment project (GIP) plays an important role in national economy in China. This paper introduces the Agent Construction System (ACS), focuses on the supervision problems of construction agent quality management in GIP. It proposes a self-control evaluation model for construction agent based on Rough Set Theory to confirm the key supervising points, and provides a agent supervision method for government. By questionnaire survey, forms an information system of the evaluation. A heuristic attribute reduction algorithm is applied in the reduction of index attribute, and then it uses the theory of attribute importance in discernibility matrix to determine the index weight. Implement reduction in quality self-control points by using MATLAB.