In this study, 2-methylisoborneol (2-MIB) and geosmin (GSM) were degraded through photocatalytic oxidation process. For 2-MIB degradation under visible light irradiation, the highest removal rate was obtained in the presence of the 0.001% Fe -0.5% N co-doped TiO2 calcined at 500 degrees C. The removal rates of 2-MIB and GSM were significantly affected by the wavelength of the lamp used during the oxidation, with the effective order of 254 nm > 365 nm > 420 nm > 475 nm. Higher steady-state concentration of center dot OH, which was obtained at shorter wavelength, led to higher T&O removal efficiency. The degradation intermediates of 2-MIB and GSM during the photocatalytic oxidation, including a series of alcohols, aldehydes and ketones, were associated with the dehydration and ring-opening pathways. In most cases, for 2-MIB photocatalytic degradation, intermediates with ring structure were yielded under visible light, while the chain compounds tended to be generated under UV irradiation. However, intermediate products of GSM were not varied from each other significantly when the wavelength changed. The abundances of the GSM degradation intermediates were larger than those of the 2-MIB degradation intermediates because GSM was easier to be oxidized than 2-MIB. The apparent degradation rates of 2-MIB and GSM in real water were lower than those in deionized water, and the humic substances in real water were decomposed into low-molecular weight substances.