Coaxial　fiber-shaped　supercapacitors　with　short　charge　carrier　diffusion　paths　are　highly　desirable　as　high-performance　energy　storage　devices　for　wearable　electronics.　However,　the　traditional　approaches　based　on　the　multistep　fabrication　processes　for　constructing　the　fiber-shaped　energy　device　still　encounter　persistent　restrictions　in　fabrication　procedure,　scalability,　and　mechanical　durability.　To　overcome　this　critical　challenge,　an　all-in-one　coaxial　fiber-shaped　asymmetric　supercapacitor　(FASC)　device　is　realized　by　a　direct　coherent　multi-ink　writing　three-dimensional　printing　technology　via　designing　the　internal　structure　of　the　coaxial　needles　and　regulating　the　rheological　property　and　the　feed　rates　of　the　multi-ink.　Benefitting　from　the　compact　coaxial　structure,　the　FASC　device　delivers　a　superior　areal　energy/power　density　at　a　high　mass　loading,　and　outstanding　mechanical　stability.　As　a　conceptual　exhibition　for　system　integration,　the　FASC　device　is　integrated　with　mechanical　units　and　pressure　sensor　to　realize　high-performance　self-powered　mechanical　devices　and　monitoring　systems,　respectively.