To solve problem of dynamic integration in e-commerce, the Multi-Agent architecture of electronic commerce platform
system based on Agent and Ontology has been introduced, which includes three major types of agent, Ontology and rule
collection. In this architecture, service agent and rule are used to realize the business process reengineering, the reuse of
software component, and agility of the electronic commerce platform. To illustrate the architecture, a simulation work
has been done and the results imply that the architecture provides a very efficient method to design and implement the
flexible, distributed, open and intelligent electronic commerce platform system to solve problem of dynamic integration
in ecommerce. The objective of this paper is to illustrate the architecture of electronic commerce platform system, and
the approach how Agent and Ontology support the electronic commerce platform system.