A comparative analysis of the water resources management and carying eapacity in Singapore, Hong Kong，Xiamen, andZhoushan was conducted. The analysis consists of the respeetive regional characteristics,including population,economic and socialdevelopment indicators，analysis of water consumption,water usage component and water resources earrying capacies. The longterm utilization of water resources and carying capacity were predicted and the coresponding countermeasures to the challenges ofwater resources utilization and management facing on Zhoushan Island Region were proposed.