Disclosed are a headlight apparatus and a method of controlling the same. The headlight apparatus provided in a transportation includes a light source unit including at least one light source and emitting a light in a forward direction of the transportation, a light source driving unit supplying a driving current to the at least one light source included in the light source unit, and a control unit receiving information about a driving environment of the transportation and determining a driving condition of the light source unit by using the received information about the driving environment. The driving condition of the light source unit includes a driving current value corresponding to a brightness of the at least one light source included in the light source unit.