A method for defogging of a vehicle includes: determining whether the defogging of the vehicle is necessary based on at least any one of an outdoor temperature, an operation state of a cooler of an air conditioner, and an operation state of a blower of the air conditioner; defogging to control an air direction mode to add or increase an air volume supplied to a window if it is determined that the defogging of the vehicle is necessary. The air direction mode is maintained in a current state if it is determined that the defogging of the vehicle is not necessary.