Today, in accordance with the bigger complexity of the system, the security concerns of a system have increased rapidly. One of the main concerns of the high security information system is the security evaluation to define the security function. Security evaluation of information security system is broadly used with respect to Common Criteria (CC) as ISO standards (ISO/IEC 15408:1999). The standardization of process assessment results is a key point for solving the problems. This paper suggests XML-based approach to introduce the establishment of compatible environments for process improvement on the Web. In this paper, we focus on creating SPIE (Software Process Improvement Environments) for wide acceptance of process improvement on the Web. SPIE DTD was defined to satisfy assessment output requirements in the ISO/IEC 15504. SPIE provides interoperability between applications that exchange process assessment results in machine-understandable XML format on the Web.