This operational activity of terrorism, which has changed in the process, has caused a change in security perceptions and has made the sustainability of the counter-terrorism with only hard power tools controversial, highlighting the necessity of supporting the fight with soft power tools and public diplomacy practices. Public diplomacy practices as a soft power tool rather than military and economic sanctions correspond to the process of winning the minds and hearts of societies by transferring the image, values and policies of states to domestic and foreign target audiences. In terms of combating terrorism, public diplomacy is of great importance in terms of strengthening the international image of states and increasing international support in the fight against terrorist organizations. Public diplomacy includes activities aimed at increasing public support by reducing the negative effects of terrorism by moving the fight against terrorism beyond the fight against weapons, preventing the political, social and economic financing, propaganda and recruitment processes of terrorist organizations. Efforts to eliminate the elements that feed terrorist organizations and cause terrorism through establishing relations with societies also necessitate smart power practices in which hard power and soft power tools are synthesized in the fight against terrorism. In this respect, in this study, which is handled with the general survey model method, the contribution of the use of soft power tools together with hard power tools in counter-terrorism strategies to the effectiveness and success of the fight against terrorism is discussed. In addition, the effect of public diplomacy in the global counter-terrorism, providing national and international cooperation and coordination and supporting the legitimacy of the struggle, is emphasized.