Because of negligence of regional economy under the centralized plan-economy-system it is impossible to bring forth scientific research on the regional economics as a result. With the substitution of economical system from plan-to market-economy the regional economy plays a more and more important role in the modernization of our country. and it is necessary to study seriously regional economics, which is also a significant way to improve economic geography. The research work of regional economy in China is divided into three parts, they are, regional economical analysis, regional economical policy and regional economical planning. Among the first part of them, classical location theory, spatial structure theory and regional growth theory are made up theory system of regional economics. This paper is focusing on the development of traditional location theory, spatial organization theory and regional growth theory in the light of regional economical development. The difference and applicability as well as the interrelationship between these theories are given a special attention in terms of the viewpoints of economic geography and parctice of China's regional development.