Superconducting magnetic energy storage (SMES) technologies have significant application prospects in fast, efficient and intelligent energy management of future smart grids. A novel SMES energy interaction model and its mutual experimental device are presented by using the circuit-field-superconductor coupled analysis principle, which friendly links the applied superconductivity field and the electrical engineering field by one SMES device. For the feasibility studies of SMES frontier applications based on the advanced SMES development and application status, SMES-based liquid hydrogen powered fuel cell electric vehicle and SMES-based low-voltage direct-current micro grid are fulfilled,practical system scheme design and feasibility analysis of smart grid application are presented, and integrated application prospects in the power generation, transmission, distribution and utilization subsystems of future smart grids are forecasted.