XML has become the most standard format of data processing for various kinds of information systems. It contains the feature of document type definition and follows the standard format in data input, so it becomes the ideal tool for inter-system data exchange or transformation. Compared to XML, the ISO 2709 format is limited by certain drawbacks when applied to data exchange. It is neither able to recognize the type of MARC and character code, nor functional in direct presentation on the webpage. The two drawbacks have brought about restrictions on automatic applications. This study adopts XML as the data format for bibliographical data exchange to analyze both foreign and domestic methods for schema formations, with references to interrelated definitions and contents. From the research result, this study plans to construct a software for the data transformation between ISO2709 files and XML documents on the basis of XML Schema. Moreover, the system analysis method will be employed to verify the feasibility of the data transformation.