With the innovation in suspension bridge structures and continuous breakthroughs in spans, greater requirements have been placed on the load capacity and intelligence level of the core equipment for large-span main girder erection—cable-mounted cranes. Traditional cable-mounted cranes suffer from insufficient overall load capacity and relatively low intelligence in the lifting process, leading to low construction efficiency and prominent safety risks. Taking the Wenzhou Oujiang North Estuary Bridge as the research and development background and through structural integration and technological innovation, a 1000-ton cable-mounted crane has achieved automatic clamp crossing, self-adaptive traction angle adjustment during travel, intelligent leveling during lifting, and remote smart operation and maintenance. This crane effectively reduces safety risks caused by human operational errors and improves the overall safety factor. This paper systematically elaborates on the structural assembly, key technological innovations, and main technical parameters of the 1000-ton cable-mounted crane, providing practical and feasible technical solutions and a theoretical basis for enhancing the safety performance and smart operation and maintenance capabilities of cable-mounted cranes.