Prussian blue and its analogs (PB/PBAs) are competitive candidates for cathode materials of rechargeable metal-ion batteries (monovalent metal such as Na and K and multivalent metal, e.g. Mg, Ca, Zn, and Al) due to their stable frame structures, tunable redox sites, and facile synthesis methods. The research progress of PB/PBAs-based cathode materials of metal-ion batteries in terms of their synthesis, structural/composition characteristics, electrochemical performance, functional mechanisms, applications, and recycling in electrical energy storage are being analyzed thoroughly. For facilitating the research and development, some technical challenges are analyzed and future research directions are also proposed for overcoming the challenges toward their practical applications. PBAs are gaining more and more attention in the field of energy storage in recent years, although there is still room for improvement. We are focusing on the knowledge from previous studies and hope that new idea can help in the further development of PBAs in electrochemical energy storage.