The dilemma of local development in Penghu results from the lack of public discussion and the failure of public policy-makings. This study therefore aims, by using IM of NGT methods, to effectively communicate with the public participators, and to initiate the focus of the interactive conference to perceive "how to decrease the doubt of the counterforce about setting up casinos". In the interactive conference, participators reached the consensuses that the foundation lies in 1. holding trips to learn from existing casino; the planning phase should 2. actively strive for officials support and 3. enhance positively to public security and 4. ensure financial distributed proportions; further implementation should 5. avoid interventions by politician, 6. ensure the proportions of locals employment, and 7. to emphasize the necessity of developing casino in Penghu and 8. to invite people from every status to expand related activities; and, the last requests are to 9. hold public hearing and statement to decrease people's suspicion and 10. set up the White Paper of Casino for Penghu for future guidance.