Current storm, when many city streets are water, pedestrian traffic, cars are often trapped. Looked filled with water, and more people are complaining about the poor drainage system, hoping the water to drain away quickly. Lack of water has become a global problem, there are hundreds of urban water shortage. On the one hand, the water did not break out, one hand in reducing groundwater a day, someone suggested why not take advantage of these rain it? ?? ?? It is estimated that if each cell, each house has its own rainwater collection system, at least you can solve irrigation and toilet flushing public space use, which will greatly reduce the amount of groundwater exploitation, but also to collect rainwater provide additional groundwater. In this regard, there are many experiences abroad lesson, China also has many community began to use rainwater collection system. Rainwater harvesting method is very simple, it is built underground cistern collects rainwater roof, water supply domestic hot water and toilets. Also included is a recharge aquifers, the surface is grass, deep underground is the recharge pond for irrigation garden ?? concrete step is to collect rainwater from the roof, rainwater pipes through the initial flow through the rain pool, underground cistern and then flows for each?. Pump with a pressure sensor pumped water supply for flushing toilets and hot water systems use. If too much water in the reservoir?, Overflow water will flow to the sand filtration area of ??aquifers recharge. In this way, the road will not cause excessive water accumulation impede pedestrian and vehicle traffic, but also conducive to recycling rainwater resources, and reduce the amount of water wasted phenomenon, green energy can be both economical and affordable. In line with the strategic thinking of national sustainable development. ? ?? Purification utilizing rainwater collection systems, rainwater harvesting, green building materials, rainwater utilization Chong Hing solution is an important way to win LEED certification (Leadership in Energy and Environmental Design) is. Unique ecological reservoir and collection systems interact naturally associated with any ideal state of green building. Provide sustainable stormwater management natural ecological model, you need to support each other in a number of design aspects, but also to a large extent provides other types of Chong Hing play space. The modular design pattern, which greatly simplifies the tedious process of communication design; according to functional requirements to achieve a direct link with the combination module, personalized custom needs. The new BMP (Best Management Practices) not only manage simple and user-friendly, but also the sustainability of the property value than traditional drainage patterns.