Abstract: The upgrade from traditional iron-steel interface to "tapping-to-ladle" technology is a critical pathway to achieve high efficiency and sustainability in steel production. Based on the technological upgrade demands of China's steel industry, this study systematically analyzes the inherent issues of traditional iron-steel interfaces, including redundant operational steps, high energy consumption and significant pollution, with a focus on the complex challenges faced by aging steel plants in adopting the "tapping-to-ladle" technology. The research highlights core technical difficulties such as the innovation of hot metal transportation logistics, scientific adaptation of non-standard vehicle and infrastructure clearances, functional reconfiguration of hot metal reception systems in steelmaking workshops, adaptive adjustments to casting processes, and integration of precise measurement technologies. For transportation optimization, Flexsim dynamic simulation and queuing theory models are proposed to synchronize production capacity and operational rhythms between ironmaking and steelmaking processes, thereby designing efficient transport routes and equipment configurations that significantly improve ladle turnover rates and reduce temperature losses. To address non-standard clearance challenges, a design methodology balancing safety and economy is developed by analyzing the static dimensions and dynamic operational characteristics of steelmaking ladles, combined with national standard clearance parameters, providing theoretical support for retrofitting existing railway lines and workshop layouts. In reconstructing steelmaking workshops, the elimination of traditional hot metal transfer zones is proposed, integrating functions such as pretreatment, desulfurization, and converter charging into the charging bay. Solutions like adding heavy-duty transfer cars or modifying external transport routes enable direct ladle delivery to target stations, eliminating intermediate pouring processes and reducing iron loss and dust emissions. Innovations in casting operations emphasize leveraging existing crane systems in steelmaking workshops to handle and tilt large-capacity ladles, thereby reducing the construction costs of dedicated casting facilities. The results demonstrate that systematic upgrades can overcome inherent technical bottlenecks in traditional iron-steel interfaces, significantly lowering energy consumption, iron loss, and pollution while enhancing economic and ecological benefits. This study provides critical insights for steel enterprises pursuing technological modernization.