With the increasing prominence of global environmental issues, people are paying more and more attention to sustainable development and environmental protection. As one of the critical industries for resource and energy consumption, the impact of the construction industry on the environment has received growing attention. In this context, the concept of green building design has gradually emerged and has been widely applied in the industry. This article analyzes the "Dual Carbon" goal and green buildings, expounds on the importance, basic principles, key technologies, and design essentials of green building design under the "Dual Carbon" goal, introduces the application strategies of green building design under the "Dual Carbon" goal, and puts forward development suggestions for green buildings. The aim is to provide more support for realizing the "Dual Carbon" goal and offer technical support for the green and low-carbon development of the construction industry.