The invention relates to solar energy and building integrated compound energy system, which belongs to the energy saving field. The invention comprises a solar heat collecting system, a hot water storing system, a radiation suspended ceiling and independent dehumidification air-conditioning system, a life hot water system, a floor heating system, and a controlling system. The solar heat collecting system is connected with the hot water storing system 2 through a pipeline. The radiation suspended ceiling and independent dehumidification air-conditioning system, the life hot water system, and the floor heating system are connected in parallel, and are also connected with the hot water storing system through pipelines. The controlling system is connected with the solar heat collecting system, the hot water storing system, the radiation suspended ceiling and independent dehumidification air-conditioning system, the life hot water system, and the floor heating system through a sensor and a relay. The invention realizes the compound use of the heat supply, the cold supply, and the hot water supply of the solar energy, has the characteristics of stable operation and high efficiency, can be matched with the existing air conditioner and can be widely used for public buildings and residential districts.