本論文以台灣「低放選址政策」的信任問題為主題，採用文獻研究、調查訪談、焦點座談、問卷調查等多元研究方法，一方面參照並補充TCC模型作為理論架構，分析「信任」如何分別透過其知識與非知識屬性，影響台東與金門兩縣民眾的最終處置場設施接受度，藉以充實對公共政策中不行動面向之理解，並增加對非科學理性因素之重視。另方面，則綜合實證分析結果，並參酌近期國/內外選址的風險溝通經驗，探討「低放選址政策」如何納入重建信任的風險溝通模式，以協調科學與民主、專家與民眾在決策過程中的關係。研究結果指出，「低放選址政策」的信任問題，彰顯了過去人們用以確保政府機關不負所託的科學理性及專家決策模式，在現代風險社會中，不再足以讓民眾繼續作出授予信任的判斷，並在風險議題中合作。有鑑於在信任的分類與運作模式中，受價值相似性啟發的信任，主導了對科學證據與信心的詮釋。因此，對風險議題進行社會選擇的決策模式，必須能夠重塑集體的價值相似性，形成新的信任穩定機制。本論文乃建議一個重視「代表性、共同框架、決策影響力」的參與式對話平台，將可藉由政策審議架構，尋求在共享價值下，可被普遍接受的正義原則及解決之道，以提升「低放選址政策」的接受度與正當性。 / In this study, the author focused on the trust problems related to the “low radioactive waste disposal site selection” topic and adopted the literature review, survey interview, focus group, and questionnaire survey study methods. One of the objectives was to reference and supplement the TCC model as the theoretical framework to analyze how “trust” as well as its knowledge and non-knowledge attributes can affect acceptance for the final disposal site by the people of Taitung and Kinmen in order to enrich our understanding of the inaction in public policies and strengthen the emphasis on non-scientific rationality factors. The other objective was to incorporate the analysis and empirical results, reference the recent domestic/foreign disposal site selection risk communication experiences, and explore how to incorporate a trust rebuilding risk-communication method into the low radioactive waste disposal site selection, in order to coordinate the relationships between science and democracy as well as the experts and citizens throughout the policy-making process. The trust problems related to low radioactive waste disposal site selection discussed in this study highlight the fact that the scientific rationality and expert policy-making mode relied upon by the government agencies are no longer sufficient for the people to trust the government’s judgments or cooperate in the risk topics during the modern risk society. In terms of TCC model, trust inspired by value similarities drives the interpretation of scientific evidence and confidence. Therefore, the policy-making process that enable to risk-topic related social choice must be able to reshape the shared value and form a new trust stabilization mechanism. In this study, the author proposed a participative discourse platform that emphasizes on “representation, collaborative framing, and decision impacts” may adopt the framework for policy deliberation in search of shared values, as well as generally accepted justice principles and solutions, in order to enhance the acceptance and legitimacy for the low radioactive waste disposal site selection.