1- Introduction: The world has encountered an urban revolution in the past 200 years. In 1800, the cities were a small island in rural ocean, now in 2000; half of world populations were living in cities. It has been stated that it reaches to 65 percent in 2025, While they occupied just 2 percent of the earth, and upon UN forecast, 80 percent of next decade population growth take place in cities, 90 percent from this rate will occur in cities of developing countries. Urbanization is growing fast in our countries and upon 1385 year census results, over 68 percent are civic, while just 10 percent of country population were living in cities in last century. However, the opportunities, sources and facilities do not distributed appropriate to improve human requirements in cities.