This study aimed to evaluate the relationship between the dynamic changes in the abundance of fish eggs and larvae with respect to the environmental factors in Daya Bay. In the fourth quarter of 2015, 31361 eggs and 244 larvae were collected, including eggs from 19 species, belonging to 6 orders, 16 families, and 18 genera. There were fish larvae from 18 species, belonging to 5 orders, 15 families and 16 genera; 11 fish species were common between the eggs and larvae collected. The eggs and larvae of Perciformes accounted for 57.9% and 73.6% of the total collection, respectively. Fish eggs belonged to 3 dominant species: sp, and species of the family Sparidae. The average abundance of fish eggs and larvae were 614.55 individuals/1000 m³ and 3.69 individuals/1000 m³, respectively. Horizontal distribution of abundances revealed that in general, the abundance in the central islands of Daya Bay was the highest, followed by that in the artificial reefs of Daya Bay. The value of Shannon-Wiener index (') for fish eggs in the investigated area ranged from 0.05-2.26, with an average value of 0.86, while that for larvae ranged from 0-2.53, with an average value of 0.86. The value of Pielou's evenness index () for fish eggs ranged from 0.02-0.99, with an average value of 0.5, while that for larvae ranged from 0-1.00, with an average value of 0.52. The results of Pearson correlation analysis showed the environmental factors that were most correlated with the population were temperature and dissolved oxygen (<0.01). Low temperature and low dissolved oxygen, within their respective suitable ranges, were more beneficial to the growth and development of juvenile fish. The spring and summer were important periods for fishes to spawn, and the central islands were the key areas for the reproduction of fish in Daya Bay.