<p>All-solid-state lithium metal batteries adopting polymer-, oxide-, and sulfide-based solid electrolytes have drawn significant interest due to their potential for enhanced energy density and non-flammable characteristics. Each type of solid electrolyte offers distinct benefits, such as the mechanical flexibility of polymer electrolytes, the thermal stability of oxide electrolytes, and the high ionic conductivity of sulfide electrolytes. However, the unstable interface between metallic Li anode and solid electrolytes remains a major obstacle, leading to issues like dendritic Li growth, increased interfacial resistance, and solid electrolyte degradation. To address these challenges, various strategies focusing on interfacial engineering have been implemented, achieving notable improvements in overall battery performance. This review focuses on strategies to stabilize the interface for each type of electrolyte, detailing principles and key effects of these approaches. In addition, the remaining challenges required for the commercialization of all-solid-state lithium metal batteries are briefly discussed.</p>