Abstract: Based on the surface free energy theory, the contact angel between asphalt, aggregate and known reagent was measurd using the contact angel measurement instrument, the adhesion and spalling work of different asphalt-aggregate systems according to relative formulas were calculated, then the adhesion work and spalling work of different asphalt-aggregate systems were compared to study the influence of different factors to asphalt-aggregate systems adhesion performance. In order to understand the influence degree of different factors to asphalt-aggregate systems adhesion performance, the grey relational analysis was conducted. The study results show that the adhesion work and spalling work are different between different asphalt-aggregate systems, in other words, the water stability is different. For the raw materials, adhesion performance is better with the increase of viscosity of asphalt and the pH of aggregate. As for the external environment influence factors, adhesion performance is worse with the increase of salt concentration and freezing-thaw cycle times, and the serious of aging level. The grey relational analysis results show that the rank from strong to weak of the influence degree in 5 influence factors is types of aggregate > types of asphalt > salt concentration > freezing-thaw cycle times > aging level. So, in road engineering, the mixture ratio design should seriously control, the asphalt with bigger viscosity and the aggregate with bigger pH should be selected, and the dosage of deicing salt should be controlled seriously.