There is a rapid increase in utlilzing the fresh water resources with the development of Shanghai . According to the monitoring data in the first four months of 2003 near Pudong International Airport Dock, the authors think it is appropriate to build the Meimaosa reservoir between the Meimaosa sand ridge and Nanhui bank. The reservoir has huge capacity of about 200 million m3 and can fully utilize and store seasonal and discontinuous water resources. The water environment of Pudong will be greatly improved and its water demand can be satisfied. The advantages and disadvantages to build the reservoir, the multifunctional development of the reservoir and the work in advance needed to do are analyzed in this paper.