A control method for a vehicle provided with a water-cooling intercooler apparatus, includes: detecting a coolant temperature of the water-cooling intercooler apparatus; detecting a rotation speed and a power consumption amount of an electric water pump (EWP) included in the water-cooling intercooler apparatus; calculating an efficiency value of the water-cooling intercooler apparatus based on the detected coolant temperature and air temperatures at an inlet and an outlet of an intercooler, respectively, included in the water-cooling intercooler apparatus; and determining whether the water-cooling intercooler apparatus is in a failure state based on the detected coolant temperature, the detected rotation speed and power consumption amount, and the calculated efficiency value.