Advancements in structural vibration reduction technology have rendered its implementation in both new and retrofitted engineering structures more viable. In particular, plate-type tuned mass dampers (TMDs) offer advantages such as easy installation, space efficiency, low maintenance, and cost-effectiveness. This study installs multiple plate-type TMDs on the top floor slab of a building equipped with a fire water tank to investigate the efficacy of structural vibration control. Employing a foundation in dynamic theory and finite element analysis using SAP2000, the influence of individual TMD parameters on vibration reduction is initially examined. Subsequently, a single TMD was dispersed to study the vibration control effect of multiple plate-type TMDs. The findings indicate that the proposed method effectively utilizes the dynamic characteristics of both the plate-type TMDs and the fire water tank during seismic events, thereby significantly reducing structural vibration with minimal modification to the original structure and the fire water tank. This study proposes a novel solution for enhancing the seismic resistance of new and existing structures through the implementation of vibration control design.