Transport and transformation of dissolved organic matter (DOM) are important components of carbon cycling in oligotrophic gyres. And we have limited knowledge about the physical and biogeochemical controls of the distributions of DOM in the surface ocean that has a direct impact on the nutrients source and carbon exportation. Here we access the data from two cruises that crossed the north Pacific subtropical gyre (NPSG) in July 2020 and February 2021 to expend our understanding of controls on dissolved organic carbon, nitrogen, and phosphorus (DOC, DON, and DOP, respectively). The ultraviolet photo-oxidation method is applied for the analysis of DON and DOP which provide accurate and reproducible measurement compared with the chemical oxidation method. Our results show that the center of the NPSG has higher concentrations of DOC, DON, and DOP in the surface ocean due to stronger stratification and limited microbial degradation. In the northern margin of the NPSG where mode water invading (33°N), lower surface concentration of DOC, DON, and DOP was observed which is affected by the stronger ventilation of sub-surface water. Higher ratios of N/P and C/P in the surface samples of this region suggest the signal of DOM remineralization from the sub-surface water. The spacious and vertical distributions of DOM in the summer and winter are presented, and we estimate the contribution of DON and DOP remineralization due to seasonal mixing based on the vertical inventories. Our results suggest that transport and transformation of DOM play an important role in the nutrient supply in the surface of NPSG.