Green manufacturing (GM) is a sustainable manufacturing mode which comprehensive considers the environmental impact and resource consumption. Based on the analysis of state-of-the-art of digital technologies application in GM, this paper provides a green manufacturing-oriented digital system framework from the integration point of GM and digital manufacturing. The green manufacturing-oriented digital system framework is consists of five components which include the basic database for green manufacturing, software supporting layer for green manufacturing oriented digital system, digital system layer for green manufacturing, enterprise integration framework and product lifecycle based operation process layer. Furthermore, some key operation technologies for green manufacturing-oriented digital system is studied, which include product lifecycle based green design technology, and semantic framework model based information integration technology. Finally, the system is applied in an automobile manufacturing enterprise and achieves well application effects.