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This book is the "Eleventh Five-Year Plan" national planning textbook for general higher education. It mainly introduces the development history, basic theories, basic concepts, basic methods and applications of electromagnetic fields and electromagnetic waves in real life. The content includes the historical significance of the establishment of electromagnetic fields and electromagnetic wave theories, electrostatic fields and constant current electric fields, boundary value problems of electromagnetic fields, static magnetic fields, time-varying fields and Maxwell's equations, quasi-static fields, propagation of plane electromagnetic waves, guided electromagnetic waves and resonator principles. The book follows the historical context of the theoretical and practical development of electromagnetic fields and electromagnetic waves, organically combines the interest of historical development with theoretical narrative and derivation, and introduces the wide application of electromagnetic fields and electromagnetic waves in daily life, economy, society, and scientific research. A large number of examples in the book emphasize basic concepts and illustrate methods of analyzing and solving typical problems; the questions at the end of each chapter are used to test students' memory and understanding of the content of the chapter; the exercises in each chapter can enhance students' understanding of the interrelationships of different physical quantities in the formulas, and also cultivate students' ability to apply formulas to analyze and solve problems.