The research and development results of agent technology are awaited as the software solution with autonomy and social ability, which can provide the way to realize social activities on the Internet. However, tile current status of the agent research is that many researches are for specific application domain and are lucking in generality, and it is hard to apply the framework of the existing research to other fields. Moreover, it is thought that practical usage of agent is in immature state that there are few pructical application examples and the system development methodology is not sufficient. In this research, the cooperative problem solving system by the multi-agent is first shown as an application development framework by the agents. Then. we present usage of templates of the agent model and the task model as the development support technique. And the evaluation according to an application construction experiment in a planning problem or the field of network community support is discussed.