"Grid" is a new hardware and software infrastructure built on internet, software running on grid is to appear open, dynamic, adaptable and interoperable. This paper presents an environment for agent-oriented analysis and design modeling based on OGSA architecture, AOMG (Agent-Oriented Modeling based on Grid) Environment, which helps developer analyze and design the distributed grid system at agent-level. The AOMG environment includes a graphical model editor, a model transformation tool that can support model transformation at meta-model level, as well as a model analysis tool based on XML. Layering mechanism of model data and AOMG modeling process framework are also discussed in this paper. At last, the process of analysis and design is illustrated through an e-commerce system case study.