To provide an air conditioning system capable of reducing energy load year-round.

A hybrid solar energy collector 2 heats the water passing through a pipe 4 with fin by solar energy, and heats the air passing through an air flow channel 5 by both of solar energy and the heat radiated from the pipe 4 with fin to create warm air and warm water. An indirect vaporization air conditioner 3 comprises a dehumidifying unit 6 provided with a dehumidifying roller 8 adsorbing moisture in the air for dehumidifying, and a heater 9 for heating the regeneration air for regenerating the dehumidifying roller 8, and an indirect vaporizing element 10 cooling the air by utilizing the vaporization heat of water. The energy load can be reduced by utilizing the warm air created by the hybrid solar energy collector 2 to the regeneration air for regenerating the dehumidifying roller 8 and utilizing the warm water created by the hybrid solar energy collector 2 as a heat source for heating the regeneration air.