The selected spectral regions of 6101.9 e5446.2 cm-1, and 11,995.4e7498.1 cm-1 were pretreated by second derivative (SD) and straight line subtraction (SLS) for alcohol strength and titratable acidity, respectively, prior to developing calibration models using partial least squares (PLS) regression with cross-validation. The highest R2c and the lowest RMSECV in the calibration set were obtained for the alcohol strength (0.923 and 4.63 mL/L) and for the titratable acidity (0.930 and 0.264 g/L). The NIR calibration models showed good correlation of determination and low predictive errors. Application of the NIR calibration models demonstrated the feasibility of NIR spectroscopy to be used as a quality control tool for monitoring the apple wine fermentation process.