The invention discloses an evaporative cooling air-conditioning system, dispense with a water tank for cool storage, utilizing wind and solar power generation. The evaporative cooling air-conditioning system is formed by an evaporative cooling cold air / water unit, a wind and solar power generation system and a water curtain wall structure, wherein the water and wind power generation system is arranged on an external roof, and the water curtain wall structure is adopted for the side walls of a house. The evaporative cooling cold air / water unit is connected with the tail end in the house through a water feeding pipe and a water return pipe respectively. An air port is formed in the house, and the evaporative cooling cold air / water unit is communicated with the air port through an air duct. According to the evaporative cooling air-conditioning system, the evaporative cooling air-conditioning technology, the wind and solar power generation technology, the cool storage technology and the water curtain wall technology are combined, the peak-valley electricity price difference at night and in the day is utilized for forming cold air and cold water, the purposes of ventilation and cool storage at night are achieved, and therefore the evaporative cooling air-conditioning system is environmentally friendly and economical and saves energy.