Core Business System of finance corporation (hereinafter referred to as the "CBS") refers to the information system of the finance corporation's main business, which gradually plays an important role in businiess processing. Because of the scarcity of literature, the author complete this article on the basis of practical experience. In this article, we focus on hardware architecture, software technology and business application associated with CBS. The existing and viable frameworks are discussed to provides an overview of finance corporation's CBS in China. At the last part, we briefly give some conclusions and suggestions about the construction of CBS in practice.