As a kind of sustainable development mode, energy-efficient building and green design is not only the ideal way of the new rural development of China in the future, but also the direction of the world's development. When taking the green energy-saving design practice and application of the new rural construction as an illustration in this paper, it turns out that the energy-efficient building and green design has broad prospects and typical meanings in the new rural construction. Wang Yu is the demonstration village of the new rural construction in Hebei province. The rainwater harvesting, waste-water treatment, gray water utilization, natural landscape of water fall, building energy conservation and biogas utilization, etc. in Wang Yu, everything without exception annotate the significance of the green design and green construction.