In order to better match the needs of integrated information infrastructure, proposes an open XML-based real-time WebGIS system model which is used in integrated information infrastructure. This system model is based on the analysis of WebGIS current development situation and follows the OGC (Open Geospatial Consortium)’s open standards , uses OGC Web Service as the foundation and combines with specific techniques such as GML (Geography Markup Language) / SVG (Scalable Vector Graphics Markup Language) and Ajax. Through practice in specific project, this system model can solve some shortcomings of the original system and has greater advantages than the traditional technology. It fit well with the needs of integrated information infrastructure.