This paper proposes a data interchange prototype system based on the XML technologies. After XML was completed by W3C, no matter in the fields of academic research or in the fields of industry application, many relational topics on XML had been studied. Nowadays, besides of XML's development, people also starting to try to put XML into practice. The purpose of this paper is to develop an XML-based data interchange prototype system on Internet, and to prove the excellence capability of XML on data interchange. The proposed architecture of the system has seven modules: 1.Data Searching Module, 2.XML Transforming Module, 3.Data Transferring Module, 4.XML Parsing Module, 5.XML Data Presentation Module, 6.Data Storage Module, and 7.Metadat Transforming Module. They cooperate with each others and active as a data integrating system in the distributed environment. The experimental result shows the practicability of his prototype system. It will also be a foundation of studying XML-based Internet application in the future.