An air-conditioning system for a vehicle comprising: an air-conditioning apparatus (90, 91A) having a compressor that compresses a first refrigerant and a first heat exchanger that exchanges heat between the first refrigerant and external air and performing temperature regulation of air in a vehicle interior of the vehicle; and an equipment cooling apparatus that circulates a second refrigerant between equipment for electrically driving the vehicle and a second heat exchanger to release heat absorbed from the equipment to the air in the vehicle interior in the second heat exchanger, characterized in that the air-conditioning system further comprises a heat-radiation suppressing structure that suppresses heat dissipation from the equipment to surrounding environment; the equipment for electrically driving the vehicle includes a motor, an inverter and a battery; the battery, the inverter and the motor are arranged from an upstream side to a downstream side of a flow of the second refrigerant in order of the battery, the inverter and the motor so that a piece of the equipment having a larger amount of heat generation is arranged at a position further downstream in the flow of the second refrigerant; the equipment cooling apparatus releases heat absorbed from the equipment, heat dissipation of which to the surrounding environment is suppressed, and the air-conditioning apparatus (90, 91A) performs temperature regulation of air in the vehicle interior; the battery is disposed below the vehicle interior; the motor and the inverter are disposed in a motor reception room that is different from the vehicle interior and is exposed to the external air; and the heat-radiation suppressing structure includes a heat insulating member that covers the motor and the inverter, and the heat insulating member is a casing for accommodating the motor and the inverter. an air-conditioning apparatus (90, 91A) having a compressor that compresses a first refrigerant and a first heat exchanger that exchanges heat between the first refrigerant and external air and performing temperature regulation of air in a vehicle interior of the vehicle; and an equipment cooling apparatus that circulates a second refrigerant between equipment for electrically driving the vehicle and a second heat exchanger to release heat absorbed from the equipment to the air in the vehicle interior in the second heat exchanger, characterized in that the air-conditioning system further comprises a heat-radiation suppressing structure that suppresses heat dissipation from the equipment to surrounding environment; the equipment for electrically driving the vehicle includes a motor, an inverter and a battery; the battery, the inverter and the motor are arranged from an upstream side to a downstream side of a flow of the second refrigerant in order of the battery, the inverter and the motor so that a piece of the equipment having a larger amount of heat generation is arranged at a position further downstream in the flow of the second refrigerant; the equipment cooling apparatus releases heat absorbed from the equipment, heat dissipation of which to the surrounding environment is suppressed, and the air-conditioning apparatus (90, 91A) performs temperature regulation of air in the vehicle interior; the battery is disposed below the vehicle interior; the motor and the inverter are disposed in a motor reception room that is different from the vehicle interior and is exposed to the external air; and the heat-radiation suppressing structure includes a heat insulating member that covers the motor and the inverter, and the heat insulating member is a casing for accommodating the motor and the inverter.