The evaluation of carrying capacity of water resources is an important mean to judge whether the water resources of a city is safe. Taking Quzhou city as the research object , the paper chose the main indexes of carrying capacity evaluation of water resources by grey correlation model.It calculated the total value of water resources carrying capacity and the weight by use of entropy-weight method. Results indicate that ①the weights of sewage treatment rate and water consumption per ten thousand yuan GDP are 0.1719 and 0.1261 respectively,which are the main indexes of water resources carrying capacity evaluation.②The total value of water resources of Quzhou had been raising gradually from 2004 to 2011. In 2010, the value reached the highest which is about that of 1.23 times in 2004. The paper analyzed the status of water resources in Quzhou and propsed some suggestion for the sustainable utilization of water resources.