Efficient　catalytic　elimination　of　hydrogen　sulfide　(H2S)　with　high　activity　and　durability　in　nature　gas　and　blast-furnace　gas　is　very　critical　for　both　fundamental　catalytic　research　and　applied　environmental　chemistry.　Herein,　atomically　dispersed　Co　atom　catalysts　with　Co–N4　sites　that　can　transform　H2S　into　S　with　conversion　rate　of　≈100%　are　designed　and　prepared.　The　representative　4Co-N/NC　achieves　a　sulfur　yield　of　nearly　100%　and　TOF(Co)　of　869 h–1　at　180 °C.　Importantly,　remarkable　long-term　durability　is　achieved　as　well,　with　no　obvious　loss　of　catalytic　activity　in　the　run　of　460 h,　outperforming　most　of　the　reported　catalysts.　The　short　bond　length　and　strong　cooperation　of　Co–N　are　beneficial　to　improve　the　structural　stability　of　the　Co–N4　centers,　and　significantly　enhanced　resistance　of　water　and　sulfation　over　single-atom　Co-catalyst.　The　present　mechanism　involves　the　stepwise　hydrogen　transfer　process　via　the　adsorbed　*HOO　and　*HS　intermediates.　©　2021　Wiley-VCH　GmbH.