The effects of nitrogen (N) addition and increased precipitation on nitrous oxide (N₂O) emissions in alpine meadow ecosystems are still unclear. In this study, we measured N₂O fluxes on the Tibetan plateau under interactions of moderate atmospheric N deposition and increased precipitation using a closed chamber method. Under all applied treatment conditions, the alpine meadow ecosystem acted as a source of N₂O. The N₂O emission rate reached a maximum of 74.83±14.40 μg m^-2 h^-1, with a significant increase in emission rate of 68.76% following N addition when compared with the control plot (p<0.05). Increased precipitation, and its interactive combination with N deposition, enhanced the N₂O emission rate by 53.90% and 44.52%, respectively. However, there was no significant difference between these two treatments. Increased precipitation would help to mitigate N₂O fluxes under global nitrogen deposition conditions.