High-entropy ceramics with five or more cations have attracted great interest due to their excellent properties in various structural and functional applications. After the introduction of the concept of entropic stability, significant efforts have been made to increase the entropy, minimize the Gibbs free energy, and achieve stable single-phase high-entropy ceramics. This paper reviews the recent research progress on high-entropy ceramic films and coatings in recent years. Firstly, the microstructure of high-entropy ceramic films and coatings is introduced from the concept of high entropy in them; then the preparation methods of high-entropy ceramic films and coatings are outlined, and the research results on their excellent properties are summarized in detail; finally, the prospects of high-entropy ceramic films and coatings are presented on this basis.