Abstract: In order to simplify the design and implementation of mobile agents systems, a principle of building a mobile Agent system based on the Object Oriented PETRI Nets that are used as a system modeling language is described in the paper. The developing environment mentioned in the paper consists of visual system modeling, deadlock detecting, and actual system enacting tools. The basic concepts of OOPN and Aglets of Agent programming library are introduced first in this paper. Then, the implementing mechanism of generating a mobile Agent systembased on OOPN is described, and algorithms for creating and deploying remote Agents are also introduced in the paper. Finally, an example on the producer and consumer problem is used to show the whole process of Agent systemperforming.

Key words: system modeling, object oriented PETRI net, mobile Agent, Aglets