Due to e-commerce had an enormous vogue service applied over Internet, PCCEY (Public Construction Commission, Executive Yuan) was aware strongly of lending an impetus to deploy government referred electronic service systems, such as GPIS (Government Procurement Information System) GEPS (Govermant Electronic Porcurement System) GECIS (Govermant Electronic Catalog & Inquire System) GCSCIS (Govermant Common Supply Contract Information System) etc,. However, there are some difficulties in need of integration with those systems because system was independent each other. The XML (eXtended Markup Language) standard has been matured in these years and provides a good solution in data exchanging in heterology systems. The purpose of this research hopes to achieve system integration by establishing XML standards.