The invention discloses a compound type floor heating air conditioner hot water integration application system, which comprises a hot water tank, a first hot water pump, a plate type heat exchanger, a first power-driven three-way valve, a second hot water pump, a second power-driven three-way valve, an air conditioner water tank, an air energy main engine, a floor heating tail-end, an air-conditioner tail-end, a controller, a solar power circulating pump, and a solar collector, wherein a second interface p15 is connected with an interface p16; an interface p17 is connected with an inlet of the second hot water pump; an outlet of the second hot water pump is connected with a third interface p18; the interface p16 is a circulating inlet of air energy; the interface p17 is a circulating outlet of the air energy; an interface p19 is connected with an interface p20; an interface p21 of the solar collector is connected with an interface p22 of the hot water tank. According to the system, each part is connected through pipelines; free switching of working modes of air energy water heating, air energy heating, air energy refrigeration, solar power water heating, and the like is realized through a special control system; meanwhile, solar heating is realized.