As an important means for enterprises to achieve sustainable development, sustainable product strategy has received increasing attention. In the study of sustainable product strategy, transition design is a relatively new and forward-looking research method that proposes a design philosophy and approach by focusing on the trends of future social, cultural, and technological changes, aiming to promote sustainable development and social innovation. This paper analyzes the sustainability issues of corporate product strategy through the STEEP and multi-level perspective (MLP) approaches and develops a product strategy framework under the perspective of transition design. Based on the evaluation of five energy consumptions throughout the product life cycle, a product design strategy process is proposed. By establishing a product strategy system that promotes positive economic, social, and ecological cycles of energy consumption at corresponding stages, this system can coordinate stakeholder interests, meet the goal of sustainable development for the enterprise, and shape sustainable lifestyles for users. This study adopts a research approach that combines a transitional design perspective, sustainable design theory, and systems thinking methods, which fills the gaps in traditional design research methods in sustainable product strategy, provides enterprises with more sustainable product design solutions and promote the realization of sustainable development.