With the emergence of complex economic and social decision-making problems and the increasing complexity and uncertainty of the decision-making environment in China, traditional group decision-making theories and methods are undergoing profound change. Large-group decision-making theory and methods have developed and become hot fields in quantitative decision-making research with broad application prospects in practical decision-making scenarios. In this paper, we review current research and development in large-group decision-making from three main aspects: Multi-attribute, conflict-related, and risk-related large-group decision-making methods. We then introduce research hotspots and the latest progress in the field of large-group decision-making, and discuss its problems and challenges. Lastly, we note the future development trends in large-group decision-making.