This article centers on the selection and energy efficiency analysis of industrial fan motors. Using a typical 40kW IE3-class industrial fan motor as an example, it dissects its nameplate parameters—including 440–480V star-connected voltage, 61A rated current, 40kW shaft power, 200mbar positive pressure and -220mbar vacuum capability, 86dB(A) noise level, and IE3 efficiency class—and points out that these parameters collectively determine the system's actual energy consumption and operational performance. The article further notes that while conventional VFD-driven induction motors enable speed control, they suffer from inherent limitations such as rotor losses, stator copper losses, magnetic losses, and inverter switching losses, which accumulate into significant operating costs under continuous long-term operation. To address these challenges, OPD has developed high-power permanent magnet servo motor technology based on advanced PMSM principles. By using permanent magnets to directly establish the rotor magnetic field, it eliminates excitation losses and achieves efficiency levels of up to 99% under optimized conditions, while also delivering higher torque density, faster response, more precise speed control, and reduced vibration and heat generation—thereby enhancing both energy efficiency and operational stability and reliability. The article concludes that high-efficiency motor selection has evolved from a mere component choice into a strategic decision affecting productivity, energy costs, and sustainability.