Abstract: Taking the “Wooden Pavilion” of Jiangsu Green Building Expo Park as an example, “passive design” was the preferred strategy in every stage of architectural design and the applicable green technique was determined according to local conditions. Incorporating passive energy-saving design into architectural creation, the performance simulation of building energy saving design was carried out by applying relevant software. The integration of green building design and modern timber structure techniques was discussed from the three aspects of green building design that responds to regional climate, energy-saving design of envelope structure and prefabricated timber structure techniques. The wind field outside the building, the building orientation, the indoor space environment and the external envelope enclosure of the timber structure were simulated and analyzed by using the relevant software. Meanwhile, the thickness of exterior wall and roof insulation materials was optimized from the perspective of economy. The results showed that reasonable building orientation and functional space organization, high-performance envelope enclosure of timber structure, planting roof, adjustable exterior shading as well as photovoltaic integrated design could effectively reduce building energy consumption and achieve the energy-saving goal of ultra-low energy consumption buildings.