Recently, plastic waste problem becomes one of the serious social and environmental problems. Because conventional plastic recycling process can’t solve the problems, various technologies including chemical or biological upcycling have been suggested and developed. Mimicking lignocellulose biorefinery, PET can be upcycled into various value-added chemicals by the hybrid of chemical and biological conversion processes. However, complex procss for the PET upcylcing have hindered the commerciallization. To address the issues, here, new concepts for PET upcylcing technologies will be introduced. Detailed concepts with results will be presented in seminar.