Great　progress　has　been　made　in　the　electrochromic　(EC)　technology　with　potential　applications　in　various　fields.　As　one　of　the　most　promising　EC　materials,　Prussian　blue　(PB)　has　attracted　great　attention　due　to　its　excellent　EC　performance,　such　as　low　cost,　easy　synthesis,　rich　color　states,　chemical　stability,　suitable　redox　potential,　and　fast　color-switching　kinetics.　This　review　summarizes　the　recent　progress　in　PB　electrodes　and　devices,　including　several　typical　preparation　techniques　of　PB　electrodes,　as　well　as　the　recent　key　strategies　for　enhancing　EC　performance　of　PB　electrodes.　Specifically,　PB-based　electrochromic　devices　(ECDs)　have　been　widely　used　in　various　fields,　such　as　smart　windows,　electrochromic　energy　storage　devices　(EESDs),　wearable　electronics,　smart　displays,　military　camouflage,　and　other　fields.　Several　opportunities　and　obstacles　are　suggested　for　advancing　the　development　of　PB-based　ECDs.　This　comprehensive　review　is　expected　to　offer　valuable　insights　for　the　design　and　fabrication　of　sophisticated　PB-based　ECDs,　enabling　their　practical　integration　into　real-world　applications.