In the process of urbanization, the most preferential and imminent problem dealing with is overpopulation. This situation occurred in Paris in nineteen century. It seriously influenced the functions of existed urban organizations and impacted the capacity of needs and supplies. Therefore, the renewal and reviviscent plan was necessary for Paris. George Baron Haussmann was selected to do this work.This thesis aims directly at Haussmann's regulative urban development plan. It is explored by four subjects, which were transportation, public health, comfort and the beauty of city. Besides, other theories will be compared and discussed in details, to understand the whole picture of the challenge on solving the conflicts between modernization and preservation of historical issues.