This paper discussed the basic intention of timber saving and substitution (TSS), reviewed the historical development and current status of TSS, and introduced domestic and foreign theories of TSS which are analyzed and evaluated according to the author s judgment.

In order to know the water consumption of chemical industry and pectro-chemical engineering in China,and provide basis for the implementation of national water-saving policies,the design data of water consump-tion for more than 200 projects undertaken by design departments of chemical and pectrochemical system science the year 2000 were collected,statisticed and analyzed.

So, the depth knows about the water resource essential features, Adopt the correct use water water-saving countermeasure,are Very important to our country economy , society and environment harmonizes sustainable development.

The Research of the Construction and Perfection of the Water-saving System in Our Country;

Promoting agricultural water- pricing reform to accelerate water saving in irrigation district;

Strengthening the management of water resources, carrying out water planning and water saving policy;

According to the analysis of contaminative source of CWM production,and the vice of sewage purification in building workshop now,we put forward a new train of thoughts of sewage reclaim,so the cleanly production and water saving were realized.