To evaluate the influence of aggregate morphological characteristic on aggregate-asphalt adhesion and its moisture stability， a new method of quantitative aggregate-asphalt adhesion test was proposed. The morphological characteristics of aggregates from five sources were tested by aggregate image measurement system （AIMS）， and the moisture stability of asphalt mixture with different aggregate morphological characteristics was evaluated. The relation of aggregate morphological characteristics to adhesion of aggregate-asphalt and its moisture stability was established. The influence of aggregate morphological characteristics on the adhesion and moisture stability was analyzed based on the grey correlation method. The results show that the proposed quantitative test method of aggregate-asphalt adhesion is simple and reliable. The moisture stability of asphalt mixture is best when the aggregates morphological characteristics have best angularity in the range of 2 500-3 000 and the best sphericity in the range of 0.65-0.75. With the increase of surface texture， the moisture stability of asphalt mixture is enhanced. The surface texture， angularity and sphericity have the greatest influence on aggregate-asphalt adhesion， water immersion flying loss， freeze-thaw splitting strength ratio and stripping inflection point， respectively.