SCEPTER is an open-source code library dedicated to training, tuning, and inference for generative models, covering a range of downstream tasks such as image generation, transfer, and editing. It integrates mainstream implementations from the community as well as independently developed methods from Alibaba's Unisound Lab, offering a comprehensive and general-purpose toolkit for researchers and practitioners in the generative field. This versatile library aims to promote innovation and accelerate the progress of this rapidly evolving field.