Predatory ladybirds are important agents of biological control in agricultural ecosystems, playing a key role in the environmentally-friendly and sustainable management of many agricultural pests, including aphids, whiteflies and scale insects. This review systematically summarizes advances in the utilization of predatory ladybirds in China, their current status in biological control applications, the development of methods for the mass-rearing of ladybirds in captivity, and innovations in field-based, pest control techniques. It focuses particularly on the breeding of superior strains, the development of artificial diets, diapause regulation, the coordinated release of multiple biological control agents, and chemical ecology-based behavioral manipulation. The aim is to provide both theoretical and practical guidance for improving the application of predatory ladybirds for the biological control of pests in China, thereby supporting the sustainable, ecologically-friendly control of agricultural pests.