With the rapid development of urbanization,the city is facing with increasing challenges by the problem of water resource.Based on a survey of the realistic situation of the urban rainwater resources in Hangzhou,and considering domestic and overseas experiences in utilization of unban rainwater,the feasibility and potential of utilizing urban rainwater in Hangzhou City were evaluated,proposing basic approaches and measures to achieve ecological utilization of unban rainwater resources in Hangzhou,and providing a basic idea to construct a water saving city.