The load characteristics and energy-saving method of Tung Ho Spinning Company are analyzed in this thesis. At the factory ,the capacitors are installed to improve the power factor. The molded type transformers are adopted for higher efficiency utilization. The old motors are replaced by the ones with frequency inverter controller to increase the effiency. The air condition system, the high-efficiency compressor and central supervision control are employed. Meanwhile, the enhanced cleaning of cooling water is taken. Finally, the adequate contract demand is calculated. The contract electricity charge can be reduced and power system supplied capacity can be estimated more accurately by the utility Company.