Abstract: The energy-saving transformation of existing buildings is the requirement of global green development. In order to explore the role of government, consumers and enterprises in the process of building energy-saving transformation promotion, a tripartite game model of existing building energy-saving transformation participants was established, and the influence of the cost and incremental income of participants on building energy-saving transformation promotion was analyzed. Combined with the principle of system dynamics, Vensim software was used to simulate, and the evolutionary stability strategy in different situations was discussed. The results show that improving the incremental benefits brought to the game players after the transformation of existing buildings is helpful to promote the energy-saving transformation of existing buildings. The government’s subsidy incentive policy can promote the transformation of existing buildings to a certain extent.

Key words: existing buildings, energy-saving transformation, evolutionary game, incremental income