This paper examines the evolution of Korea-France relations, focusing on the growing significance of cultural exchange and soft power. It traces the transition from early religious contacts and conflicts to official diplomatic ties, disruptions, and renewed cooperation, culminating in dynamic contemporary relations centered on culture. The study highlights how the Korean Wave (Hallyu)—including K-pop, K-dramas, and Korean literature—has dramatically enhanced Korea’s image and influence in France, particularly among younger generations. Major diplomatic anniversaries, such as the 100th, 120th, and 130th years of bilateral relations, have served as milestones for large-scale cultural events, deepening mutual understanding and public engagement. Despite the success of Hallyu, challenges remain, including generational gaps, distribution barriers, and a limited in-depth understanding of Korean culture. The paper proposes strategies for the upcoming 140th anniversary, advocating for balanced exchanges between popular and fine arts, expanded artist residencies, and digital innovation to strengthen sustainable cultural ties and Korea’s soft power in France.