An air conditioning and hot-water supply system comprising: an air conditioning refrigerant circuit configuring an air conditioning cycle by circulating an air conditioning refrigerant, a hot-water supply refrigerant circuit configuring a hot-water supply cycle by circulating a hot-water supply refrigerant, and a control device (1 a); an intermediate heat exchanger connected in parallel with an air conditioning heat source side heat exchanger for exchanging heat between the air conditioning refrigerant and the atmosphere in the air conditioning refrigerant circuit, and connected in parallel with a hot-water supply heat source side heat exchanger for exchanging heat between the hot-water supply refrigerant and the atmosphere in the hot-water supply refrigerant circuit for exchanging heat between the air conditioning refrigerant and the hot-water supply refrigerant; an air conditioning refrigerant flow-in amount adjusting means configured to adjust an amount of the air conditioning refrigerant flowing into the air conditioning heat source side heat exchanger or the intermediate heat exchanger in a cooling operation by the air conditioning cycle; and a means configured to measure temperature of an air conditioning heat exchanger outlet of one of the air conditioning heat source side heat exchanger and the intermediate heat exchanger at which the amount of the air conditioning refrigerant flowing into the air conditioning heat source side heat exchanger or the intermediate heat exchanger is adjusted in the cooling operation; characterized in that the control device (1 a) calculates an air conditioning heat radiating amount in the air conditioning refrigerant circuit, a hot-water supply heat absorbing amount in the hot-water supply refrigerant circuit, a target condensation temperature at the air conditioning refrigerant circuit, and a target evaporation temperature at the hot-water supply refrigerant circuit in a case where the cooling operation by the air conditioning cycle and a hot-water supply operation by the hot-water supply cycle are simultaneously executed; and when the air conditioning heat radiating amount is larger than the hot-water supply heat absorbing amount, the hot-water supply refrigerant is blocked from flowing into the hot-water supply heat source side heat exchanger by hot-water supply refrigerant blocking means, and the amount of the hot-water supply refrigerant blocking means, and the amount of the air conditioning refrigerant flowing into the air conditioning heat source side heat exchanger or the intermediate heat exchanger is adjusted by controlling the air conditioning refrigerant flow-in amount adjusting means based on the temperature of air conditioning heat exchanger outlet. an air conditioning refrigerant circuit configuring an air conditioning cycle by circulating an air conditioning refrigerant, a hot-water supply refrigerant circuit configuring a hot-water supply cycle by circulating a hot-water supply refrigerant, and a control device (1 a); an intermediate heat exchanger connected in parallel with an air conditioning heat source side heat exchanger for exchanging heat between the air conditioning refrigerant and the atmosphere in the air conditioning refrigerant circuit, and connected in parallel with a hot-water supply heat source side heat exchanger for exchanging heat between the hot-water supply refrigerant and the atmosphere in the hot-water supply refrigerant circuit for exchanging heat between the air conditioning refrigerant and the hot-water supply refrigerant; an air conditioning refrigerant flow-in amount adjusting means configured to adjust an amount of the air conditioning refrigerant flowing into the air conditioning heat source side heat exchanger or the intermediate heat exchanger in a cooling operation by the air conditioning cycle; and a means configured to measure temperature of an air conditioning heat exchanger outlet of one of the air conditioning heat source side heat exchanger and the intermediate heat exchanger at which the amount of the air conditioning refrigerant flowing into the air conditioning heat source side heat exchanger or the intermediate heat exchanger is adjusted in the cooling operation;