Abstract:With solar heating and electrical installations integrated system as the research object,the photovoltaic modules,solar collector and hot and cold electrical installations are designed.With an integrated system,in the traditional supply system as the object of reference,through discussing two kinds of operation modes,"to the electric heat" and "thermal power",a certain power of photovoltaic modules is put forward with solar collector in the area of formula,and the energy conservation and emissions reduction rate as the evaluation index of this system to evaluate the solar energy in three typical urban architecture (office buildings,commercial buildings,residential buildings) in the reasonable way of use.The results show that the optimal coupling mode of solar energy in the office building is the solar energy joint supply system in the heat setting mode.When the solar energy joint system is running in the electric heating mode,different buildings have the best coupling of photovoltaic form.