To comprehensively and accurately evaluate aggregate surface pore structures and characterize asphalt infiltration into these pores, this study compared pore structure parameters of limestone and basalt aggregates measured by nitrogen adsorption (NA) and mercury intrusion porosimetry (MIP). An integrated characterization method combining NA and MIP was developed to determine full-range pore size distributions. The asphalt-aggregate interfacial bonding was examined using 3-D digital microscopy, whereas infiltration and wetting properties were analyzed by considering the asphalt surface tension, the pore size of the aggregate surface, and the contact angle between asphalt and aggregate. The study showed that the cumulative pore surface areas of limestone and basalt measured by NA were 6.210 and 24.281 times those measured by MIP, respectively, whereas the cumulative pore volumes were only 0.026 and 0.041 times those of MIP. The average pore diameters measured by NA were at nanometer scale, whereas those by MIP were at micrometer scale. The transition pore diameter for method integration was determined as the pore size corresponding to the minimal difference in incremental surface area and volume between the two methods. The integrated characterization method showed limestone had smaller cumulative pore surface area but larger cumulative pore volume than basalt. Asphalt infiltration into aggregates followed a partial infiltration model, with infiltration depth ranking as: I-D SBS-modified asphalt > I-C SBS-modified asphalt > 50# base asphalt > 70# base asphalt > 90# base asphalt. The infiltration depth in limestone was over 2.5 times that in basalt, indicating that larger average pore diameters facilitate easier asphalt infiltration into aggregate surfaces. Pore diameter accounted for 60 % of infiltration depth variation, surpassing contact angle (30 %) and surface tension (10 %). The competitive effects between infiltration depth and wettability critically influences mixture adhesion and design.