High-temperature electrolysis via a solid oxide electrolysis cell (SOEC) is considered as one of the most potential energy conversion and storage technologies due to its high energy conversion efficiency, modularization and easy assembly, and flexible application. Methane-assisted SOEC mode, which combines the state-of-the-art SOEC system with partial oxidation of methane (POM) reaction, was used to effectively reduce the energy consumption and produce a high-quality synthesized gas (i.e., a mixture of CO and H₂). This novel SOEC mode can utilize different energy networks including electricity, heat and gas, which can efficiently and flexibly transform different energies and realize the optimal utilization of energies and resources. This review represented recent developments on methane-assisted SOEC mode. The thermodynamic parameters, the Nernst potential, electrochemical performance, products compositions as well as energy structure and efficiency of methane-assisted SOEC mode were summarized. In addition, the research status of the electrode system for methane-assisted SOEC mode was also reviewed, and the future prospects of methane-assisted SOEC mode were discussed.