To solve the power supply problem of high voltage equipment in electric power systems, this article proposes an innovative ultrasonic power transmission (UPT) insulator system with high-voltage insulation and power transfer capabilities. The design scheme of an UPT insulator system, which can achieve an insulation distance of a few meters, is introduced in detail. System characteristics and energy loss are analyzed using different insulation transmission materials based on the equivalent circuit model of an UPT system, and a circuit design method is introduced. Furthermore, the main causes of energy loss are analyzed by simulation, and the structure of an UPT insulator system is optimized to improve transmission efficiency. Finally, a prototype of the UPT insulator with a maximum transmission efficiency of 57.28% and an output power of 72.62 W is constructed. The total length of the insulator is 1 m, which ensures that it can withstand a dc voltage of 50 kV. In addition, the insulation distance of the proposed UPT insulator design can be further increased without impacting the system performance.