Teachers have trouble in teaching an introduction to economic geography because of their limitations.

The most famous theories are the Marshall s external economy theory,the Krueman s new economic geography theory and the Porter s new competitive advantage theory and so on,this article emphatically combs the evolution course of these theories,and presents them to the readers.

This article generalizes the construction process of the key discipline navigation database,puts emphasis on some insights into the construction of CALIS theoretical economics navigation data base,and forecasts the prospects of it.

This paper reviews the development of theoretical economics in China for the last three decades;in doing so it reveals the driving forces of theoretical economics innovations,which are bestowed by the great practice of reform and opening up.

The author concludes the existing theories, then discusses the interrelationship among economics, political economics and western economics, holds that the subject classification of economics should follow the principle that there is one sole standard, and reflects briefly the complicated interrelationship between theoretical economics and branches of applied economics by graphs.