As the global energy crisis and environmental issues become increasingly severe, building energy conservation has become an important topic for sustainable development. Artificial intelligence (AI) technology, with its powerful data processing, pattern recognition, and autonomous learning capabilities, provides new ideas and methods for optimizing building energy conservation. This article first analyzes the challenges faced in the field of building energy conservation and elaborates on the current applications of AI technology in building energy consumption forecasting, energy-saving control strategy optimization, and building energy management systems. It then explores the application potential of AI technology in optimizing building energy conservation, By simulating and analyzing a large number of possible building configurations through intelligent algorithms, the most energy-efficient solutions are selected. This ultimately enables architects and engineers to fully consider factors such as building orientation, insulation, material performance, and energy systems throughout the entire lifecycle of the building, thereby making the building more energy-efficient during operation.