In this chapter the contents from Chaps. 2 – 6 are briefly summarized, and the status of electromagnetic phenomena in superconductors is overviewed in the context of the current electromagnetic theory. Superconductors also have high potential for applications in various fields because of their characteristic features such as non-dissipative current and non-linear quantum phenomena. We focus on their applications in the medical, environmental, and energy fields. Finally, it should be emphasized that various electromagnetic phenomena in superconductors, whether reversible or irreversible, are concerned with the flux pinning. The possibilities and direction of progress of this science, which will extend over electromagnetism and irreversible thermodynamics in the future, are discussed.