This technology is an improved version of traditional steam distillation. By optimizing the condensation system, it achieves highly efficient condensation during the extraction of plant essential oils. The condensation system can automatically adjust the cooling water temperature, recycle water resources, and maintain a constant steam pressure and temperature. There is no need to closely monitor and adjust the equipment. Additionally, it allows simultaneous extraction of different materials, and the essential oils and hydrosols can be collected separately, resulting in labor-saving benefits.