This research focuses on the study of the movement of civic society in order to seek for the strategy that covers public participation process in community and town building. By encouraging community to participate in planning without isolated from the local authorities. The study has five objectives which are: (1) to study and review the form and structure of community organization in development of town and community through an activity or project in Thailand and Japan, (2) to study problems and obstacles of implement and development among local authorities and communities in community and town building, (3) to explore attitudes to adjust roles of various groups of interest toward corporation between local authorities and communities in community and town building, (4) to study on how to create public space to increase an opportunity for community to participate in community and town building processes that meets community requirements with local authorities and (5) to suggest the strategies of formal corporation between local authorities and communities. Research methodology was defined using a research tool according to Participatory Action Research (PAR). This research collected quantitative data by conducting questionnaire surveys to explore the attitudes of community members toward community and town building. There are samples from three case studies, which are Samut Prakarn municipality, Samut Sakhorn municipality and Nakorn Rayong municipality. Meanwhile collecting qualitative data, by conducting Photo Elicitation Interviewing and Role Play that combined into the form of Urban Gaming Simulation, to seek for an approach to create public space to increase an opportunity for community to participate in community and town building processes with local authorities. Together with the in - depth interviews with the local authority chief executives to define the problems and obstacles of implement and development among local authorities and communities in community and town building in Thailand. The study presents several new findings, which lead to describe the paradigm shift of the community and town building by civic society in accordance with objectives defined above, as follows: (1) the form and structure of community organization in community and town building in Thailand mostly constructed for the short - term movements that reveal in the form of group with requests and resulting in the short - term solutions. In contrast to community organization in Japan that has purpose for the long - term movements with good network resulting good solutions in long run, (2) Implementation and development among local authorities and communities in Thailand still faces with problems and obstacles of limitation of information dissemination that is the barrier for the community to participate in community and town building processes. Community representative is the key to reduce this gap, together with the inappropriateness of time of the activities that often scheduled at government working hours, which is in the same time as working hours of the community, (3) social and economic characteristics (gender, age, income), behavior associated with community and town building (how to get support from local authorities) and public attitudes (satisfactions on performance of local authorities, attitudes toward community and town building, attitudes towards the role of the community), has an influence on level of community participation at a significance level of 0.05. (4) the conference tool combining various techniques with utilizations of Urban Gaming Simulation is able to create opportunities for the community to participate in community and town building process, effectively. Community is capable to learn and enhance their potential to engage in community and town building processes to the better state. As the barriers to communicate and participate among community members were minimal. As a result, the plan that came from the laboratory was satisfy the requirements of the community and (5) Corporation between local authorities and communities should have a clearer structure of collaboration. For example, sub - community organizing with the support of consultants, meaning researchers, faculty or education institution members, professionals in various fields, as well as volunteers who willing to contribute to the society. Local authorities should initiate to concern the construction community and town building processes promoting community involvement, reducing conflicts in communities by communicating through urban gaming simulation in the participatory action laboratory.