Volunteer firefighters joined the volunteer fire organization for individual free will. They were participated the activities within the organization to assist the preparation of the volunteer firefighters doing the rescue work. How the effectively use of the volunteer firefighters manpower in reduce disaster damage would be an important issue to explore. The volunteer firefighters of the Fire Bureau of Chiayi City constituted the sample for this study. The questionnaire was used. This study explored that the external locus of control and participative motivation within the volunteer firefighters can be effect on their flow experience and job satisfaction. The results of this study were as follows: 1) flow experience partial mediated between participation motivation and job satisfaction; 2) internal locus of control to enhance moderated between flow experience and job satisfaction; 3) external locus of control to diminish moderated between flow experience and job satisfaction.