Based on the statistical analysis of all the articles of Acta Geographica Sinica and Annals of the Association of American Geographers, this paper carrys out comparative study on the development venation of Geography in China and America during the past hundred years. In order to get experiences and use for reference, differences between two countries in three aspects are emphasized on: general characteristic of geography, basilic study contents and their changes, and relationship between theory and practice. American Geography experiences preliminary development period and clipping development period, and now is in persistent development period, while Chinese Geography grows up circuitously and now is in clipping development period. Human Geography is the main study area and is chronically concentrated on in America, however, in China, physical geography is firstly focused on and then physical geography, human geography, and study methods all become important now. Although American geographers put much attention on practice, their effect on national macroscopical decision-making is not as direct as Chinese geographers. The study level of geography in America is much higher than it is in China, whereas the distance between them is getting smaller. Changes in study subject in China are about three to fives years later than that in America. It is conceivable that the Asia-Pacific Area or even China may become the center of geography study allover the world. Chinese geographers should have the courage to establish geography schools with Chinese characteristic.