This paper elucidates how Washington and Seoul cooperate on AI and quantum technologies, both recognized as critical emerging technologies essential to their national interests. Technology cooperation is denoted as government-to-government efforts aimed at cultivating and developing technology, focusing on national strategies and interests. In AI, the United States holds a dominant leadership position, while South Korea demonstrates strengths in certain areas, though not across the board. Cooperation in AI primarily focuses on standardization efforts, with significant involvement of the South Korean government in partnerships with the US private sector, as well as private-sector-led bilateral research initiatives. In contrast, South Korea’s capabilities in quantum technologies are far more limited. Nevertheless, cooperation in this domain is largely centered on research collaboration, with both governments actively participating alongside international research consortia led by the United States. The differing focuses—standardization in AI and research collaboration in quantum technologies—reflect the respective strengths and needs of the two countries in these critical fields. The progression of the US-ROK alliance in this direction is both natural and beneficial, as the development of advanced and sophisticated technology is incrsaneasingly beyond the capacity of any single state alone.