An ultraviolet, UV, sterilization apparatus for a vehicle, comprising: a main power input unit configured to receive main power from a main battery of a vehicle; a main power detection unit configured to detect a state of a main power input from the main power input unit; a vehicle information input unit configured to receive vehicle information for determining a state of the vehicle; a plurality of UV modules configured to be installed at a plurality of locations in the vehicle and configured to irradiate UV rays and sterilize the interior of the vehicle during a sterilization driving time; an UV driving unit configured to drive the plurality of UV modules; and a control unit configured to receive a vehicle information input from the vehicle information input unit and the state of the main power input, and characterized in that the UV sterilization apparatus further comprises an auxiliary power input unit configured to receive auxiliary power from an auxiliary battery, an auxiliary power detection unit configured to detect a charging state of the auxiliary battery connected to the auxiliary power input unit, and a power conversion unit configured to switch between the main power input and an auxiliary power input from the main power input unit and the auxiliary power input unit, respectively, the control unit is further configured to receive the charging state of the auxiliary battery and control the power conversion unit so as to drive the plurality of UV modules independently through the UV driving unit during the sterilization driving time, and when the state of the main power input is normal after the control unit is configured to determine the operating condition of the UV modules, the control unit is further configured to determine the charging state of the auxiliary battery, and when the charging state of the auxiliary battery is greater than or equal to predicted driving power, the control unit is configured to switch the power conversion unit to the main power input so as to operate the UV driving unit. a main power input unit configured to receive main power from a main battery of a vehicle; a main power detection unit configured to detect a state of a main power input from the main power input unit; a vehicle information input unit configured to receive vehicle information for determining a state of the vehicle; a plurality of UV modules configured to be installed at a plurality of locations in the vehicle and configured to irradiate UV rays and sterilize the interior of the vehicle during a sterilization driving time; an UV driving unit configured to drive the plurality of UV modules; and a control unit configured to receive a vehicle information input from the vehicle information input unit and the state of the main power input, and characterized in that the UV sterilization apparatus further comprises an auxiliary power input unit configured to receive auxiliary power from an auxiliary battery, an auxiliary power detection unit configured to detect a charging state of the auxiliary battery connected to the auxiliary power input unit, and a power conversion unit configured to switch between the main power input and an auxiliary power input from the main power input unit and the auxiliary power input unit, respectively, the control unit is further configured to receive the charging state of the auxiliary battery and control the power conversion unit so as to drive the plurality of UV modules independently through the UV driving unit during the sterilization driving time, and when the state of the main power input is normal after the control unit is configured to determine the operating condition of the UV modules, the control unit is further configured to determine the charging state of the auxiliary battery, and when the charging state of the auxiliary battery is greater than or equal to predicted driving power, the control unit is configured to switch the power conversion unit to the main power input so as to operate the UV driving unit.