The crisis of water resource is an inriportant knotty problem which puzzles many countries of the world. Particularly, the lack of water in cities becomes more and more severe. At present,there are 300 cities in China which lack water. In the 30 cities having a population of more than one million this problern is especially striking. The problem of lacking water has become one of the important restraining factors of economic development and construction in cities. The conditions of water resource in China are not superior. The water resource is more insufficient in large areas of the north of China ,where the speed of economic development of many cities surpasses the carrying capacity of local water resource. In the future, it should be that raising the utilization benefits of water, adopting vigorous measures to tap new water source, improving the repeated utilization rate of the production-use water,and controlling the pollution of water. Also it should be that making the technique and economy policies to inspire the economic use of water, supporting the transformation of the water economizing equipments, and adjusting the structure of property. In the cities which lack water the development of the industries that demand great amount of water should be limited.