J.E Stiglitz as one of the 2001's Nobel Prizes said that China will face three challenges,and issues of urbanization issues will be most of intractability,especially the index issues of urbanization.The text begins with basic concepts of city,urbanization and so on,and summarizes the index of urbanization and its problems to construct the index system of urbanization,finally,in the basis of the index system,we comprehend urbanization and instruct modernization.