Quantitative assessment of management effectiveness is important to provide reliable theoretical support for improving management measures of wetland parks. In this research, we developed an evaluation workflow composited by 8 indicators such as socio-economic and environmental sustainable, and applied entropy theory into quantitative assessment of management effectiveness of 68 National Wetland Parks in Shandong Province. The results showed that (1) Total entropy flow of 68 National Wetland Parks in Shandong Province was -0.3018 and 41 out of 68 were negative, indicating the system tended to be stable and management effectiveness are increased. (2) Positive entropy flow mainly contributed by Effluent volume, while negative values mainly came from expenditure for environment protection. (3) Gross national product and entropy flow were negatively correlated, while the proportion of the primary and secondary industry GDP were positively correlated respectively. Based on economic development situation and entropy flow analysis, we concluded that two cities' management of National Wetland Parks were under high risk in Shangdong Province, especially Heze city. And there exists low effective and high-risk management in coastal wetlands in Shangdong Province, which needs local government's foresight conservation planning.