The critical challenge to component-based software reuse is the component operating platform based on middleware. The existing prevalent middleware has focused on the common problems in the development of distributed systems in almost every application domain

but ignored the commonality in a given domain. The openness and flexibility

which are the well-recognized important characteristics of next generation middleware

can enhance middleware of supporting vthe domain-orientation much more. This paper presents an open

flexible and domain-oriented component operating platform

called PKUAS.This paper describes the micro kernel intenor of the platform

interoperability framework and the meta-programming mechanism in detail. Moreover

this paper studies how to customize and extend PKUAS for the electric power systems.