There is material, energy and information exchange between the buildings and external environment, therefore, a building is an open and complex system. Synergetics highlights the integrity of the system and carries out research on how the subsystem cooperates with one another to produce the space, time or functional structure on the macro scale. The introduction of synergetics theory is conducive for carrying out systematic research on buildings with low energy consumption. Based on order parameter and self-organizing principle, the order parameter affecting building energy consumption is extracted and then the frame and design flow of building structure with low energy consumption are established.