Disclosed herein are an apparatus and method for controlling an electric parking brake. The apparatus for controlling an electric parking brake includes a calculation unit which calculates, when a parking operation is clamped to park, based on a current disk temperature sensed in real time by a sensing apparatus, a current parking force loss amount after parking according to the current disk temperature in real time, a determination unit which determines whether the calculated current parking force loss amount is out of a preset reference parking force loss amount range, a driving unit which drives, when the current parking force loss amount is out of the reference parking force loss amount range, the electric parking brake to re-clamp the parking operation according to a target parking force range preset in the calculation unit, and a control unit which receives the current disk temperature, transmits a calculation command to the calculation unit, transmits a determination command to the determination unit, and transmits a driving command to the driving unit.