Online measurements of typical ambient oxygenated volatile organic compounds (OVOCs) and other non-methane hydrocarbons (NMHCs) were conducted in different seasons (dry and wet seasons) of 2017 in Shenzhen University Town utilized a proton transfer reaction mass spectrometer (PTR-MS). We explored their composition characteristics and diurnal variations, and then quantified different sources of typical OVOCs based on the photochemical age-based parameterization method. Results showed that the mean concentrations of methanol were the highest both in dry and wet seasons (up to 10×10^-9~12×10^-9) among the measured OVOC species, followed by acetic acid, acetone and acetaldehyde (approximately 2×10^-9~5×10^-9), while those of formic acid and methyl ethyl ketone (MEK) were always the lowest (approximately 1×10^-9~2×10^-9). The peak concentrations of measured OVOCs in wet seasons were found significantly earlier than that in dry seasons, and the diurnal variation in the concentration of acetaldehyde was quite similar to that of ozone (O₃), suggesting that the elevated concentration throughout the daytime may originated from secondary oxidation. While the peak concentrations of methanol and MEK were found much earlier than that of O₃, indicating that they may have prominent contributions from primary emission. According to the OVOCs source apportionments, anthropogenic primary sources played the key roles for methanol, acetaldehyde, acetone and MEK in dry seasons, while formic acid and acetic acid were dominated by anthropogenic secondary sources. Besides, biogenic sources were the dominant source of acetaldehyde, acetone, MEK, formic acid and acetic acid in wet seasons.