Zirconia ceramics material has excellent stability in extreme working environments such as high temperature, corrosion, and high wear resistance, making it the preferred material for optical fiber connectors. However, as a hard and brittle material, it has high hardness, great brittleness, low fracture toughness, and poor machinability. In this paper, the design and development of a zirconia ceramics microhole grinding system is proposed to overcome the problems. This design uses a tapered steel wire dipped in diamond grinding fluid to repeatedly grind a ceramic microhole to meet the dimensional accuracy requirements. By optimizing the model and adopting the steel wire tension adjustment mechanism, frequent breakage of the steel wire is avoided. Through production testing, the optimal system has greatly improved product quality, improved production efficiency, and saved cost and time. This design also provides a reference for future precision processing of hard and brittle materials.