The　increasing　demand　for　clean　water　driven　by　the　rapid　growth　of　the　population　and　the　pollution　of　water　necessitates　the　development　of　direct　and　rapid　water　harvesting　methods.　Fog　harvesting　is　proven　as　a　highly　efficient　water　capture　method　in　dry　but　foggy　areas.　Herein,　the　state-of-the-art　developments　on　the　multiple　biomimetic　fog　harvesting　devices　(FHDs)　are　presented.　First,　the　fundamental　and　specific　mechanisms　of　fog　harvesting　involving　the　Namib　Desert　beetle,　spider　silk,　cactus,　and　Nepenthes　alata　are　described　in　detail,　respectively.　Second,　an　in-depth　discussion　on　the　mechanisms　of　fog　harvesting　including　fog　capture　and　water　transport　is　proposed.　Third,　a　detailed　account　of　the　innovative　design　strategies　and　fabrication　technologies　of　FHDs　is　proposed,　from　single　to　multiple　biomimetic　FHDs　with　typical　examples　and　the　merits　and　demerits　are　compared.　Finally,　a　critical　analysis　of　current　challenges　and　future　development　is　presented,　aiming　to　promote　next-generation　FHDs　from　scientific　research　to　practical　application.