As environmental and sustainable energy issues emerge, interest in renewable electricity, improving efficiency, and energy storage systems have grown based on carbon-supported catalysts. However, there are still many challenges to preparing catalysts to realize in a large area. Herein, a method has been devised using mass-producible conventional carbon fiber synthesis to manufacture the fabric electrocatalyst (FEC). In addition, the internal structure of fibers intertwined with metal has been investigated to elucidate the relationship between catalytic activity and structure.