This study is aimed to analyze the impact factors on tourist online information-seeking intention and behavior of tourists. Three hundred tourists interviewed initiatively sought tourist online information destinations before travelling to An Giang province. The descriptive statistic, factor analysis, structural equation modelling methods were used in this research. The results illustrated that the factors naming “subjective norms”, “attitude”, "perceived behavioral control”, “characteristics of travel” had positively influenced on “tourist online information-seeking intention and behavior”. In addition, the study revealed that the difference from the groups of age lead to the difference from “tourist online information-seeking intention” of tourists. Finally, the research gives some recommendations on communication about An Giang tourism.