Abstract: Civil servant quality is an abstract, dynamic and complex system, and System Dynamics has a unique advantage to research this complex issue. From the perspective of methodology and based on System Dynamics, this paper constructs a civil servant quality model, including quality stock, expectations, quality gap, adjustment coefficient and changing rate, and simulates the model according to different values of expectations and adjustment coefficient. Then the model with parameters, structure and boundary is optimized, and the System Dynamics is expected to have a broad prospect in the research of Public Management.