'International Passive House Conference held by German Passive House Institute annually is one of the most influential events for passive house industries in the world. It is the 20^th this year, lasting two days including various state-of-the-art theme reports about the development of passive house. With the wildly spreading of passive house around the globe, researches on energy efficiency of passive house in climate regions outside Europe is more and more popular and becomes one of the initial topics at this conference. Another primary topic is about the renovation for passive energy conservation, which brings valuable inspirations for the development of China contemporary architecture industry. '