The invention discloses an energy-saving hot water central air conditioner convenient to mount, which comprises a bottom plate, a mounting assembly and a humidification assembly, wherein a wireless communication module is arranged on the surface of the bottom plate, an air conditioning indoor unit is arranged in the middle of the surface of the bottom plate, and is mounted on a ceiling through a frame plate, lifting components are symmetrically arranged on two sides of the bottom surface of the frame plate, fixing components are symmetrically arranged on the two sides of the surface of the frame plate, a hoisting component is arranged in the middle of the frame plate, a limiting component is arranged on the hoisting component, the mounting assembly comprises a mounting plate, a limiting groove, a vertical plate, a clamping groove, a limiting frame, a wedged block, a telescopic rod and a first spring, and the mounting plate is arranged on the lifting components. According to the energy-saving hot water central air conditioner convenient to mount, an air conditioner is mounted more rapidly and conveniently, and is convenient to dismount and maintain, so that the labor intensity is reduced, meanwhile, indoor humidification can be achieved in realizing energy saving, and the energy-saving hot water central air conditioner is high in practicality.