Nitrogen-modified titanium dioxide (TiO₂) nanostructures were synthesized and systematically investigated to simultaneously evaluate their superhydrophilic properties and enhanced photocatalytic activity. The morphology and microstructure of the samples were characterized using (SEM), which revealed the formation of well-aligned nanowires with suitable surface roughness and uniform structural distribution. (XPS) analysis confirmed effective surface chemical modification through nitrogen doping and indicated a notable increase in non-lattice oxygen species, particularly surface hydroxyl groups, which play a crucial role in significantly enhancing surface properties. The wettability of the samples was quantitatively assessed by observing the instantaneous spreading behavior of water droplets on the surfaces, Photocatalytic performance was evaluated by the degradation of methyl orange under visible light irradiation, showing a remarkable improvement in degradation efficiency for the nitrogen-doped samples. This enhancement is attributed to increased visible-light absorption, reduced electron–hole recombination rates, and the higher density of active surface catalytic sites. Furthermore, the synergistic effect between the nanoscale surface structure and chemical modification contributed to the simultaneous improvement of both superhydrophilicity and photocatalytic activity. Overall, the results suggest that nitrogen modification of TiO₂ not only optimizes the surface chemistry and nanoscale architecture but also produces multifunctional materials with superior performance. Such nanostructures hold significant potential for advanced self-cleaning and environmental remediation applications, providing a promising platform for the development of high-performance semiconductor materials with enhanced surface functionalities. This study highlights the importance of combining precise surface chemical engineering and nanoscale structural control to achieve high-efficiency photocatalytic and highly hydrophilic material.