Disclosed is a cooling system for cooling an electric drive system. The electric drive system includes a motor and an inverter configured to drive the motor. The cooling system includes a first cooler, a second cooler, a circulating flow passage and a pump. The first cooler is configured to cool the motor by heat exchange using a coolant flowing through the first cooler. The second cooler is configured to cool the inverter by heat exchange using the coolant flowing through the second cooler. The circulating flow passage passes through both the first and second coolers, and the coolant circulates in the circulating flow passage. The pump is arranged in the circulating flow passage to pump the coolant.