Land Use Zoning is the most widespread local land use control tool, in use in every major U. S. city as well as many thousand smaller communities and counties. Local municipal governments since the 1920s have been the front line of public response to private land use initiatives. Zoning is certainly not the only land use regulatory measure available to local government. Authority to plan and zone land use is delegated to municipalities and counties by state legislatures through "enabling acts." State zoning acts do not require local communities to adopt zoning, but if they do, they must follow the requirements of the state law. Euclidean zoning regulates (1)the use of private land; (2)the density of structural development per unit of land; (3)the dimensions or ’’bulk’’ of buildings. Initially, each of these variables was addressed by a separate set of districts. The population and geographic extent of many urban places mushroomed at unprecedented rates. With rapid expansion came a paroxysm of threats to life, health, and morality. These would lay a constitutional foundation for the proliferation of land use regulations like land use zoning and environmental regulations to appear in 20th century. Especially, we can learn the processing, approaches, and techniques of their effort to handle the problems.