This study analyzed the impact of influencer‘s review behavior on consumer attitudes through the Dual-Mediation Hypothesis, one of the information processing theories. Specifically, we set the attributes of influencer reviews to the informativity of review contents, the entertainment of review contents, the attracion of influencer, and the expertise of influencer, and determine the effect of these variables on review attitudes. We verify the causal relationship between review attitudes, brand recognition, brand attitudes and purchasing intentions. Furthermore, We check the moderating effect of Consumer‘s Involvement. The survey was conducted through ’Macromill Embrain’, an Internet research company, and a total of 432 samples were obtained to analyze the effects of the variables through Structural Equation Model. The analysis found that the informativity of review content, the entertainment of review content, the attraction of influencer and the expertise of influencer all had a significant effect on review attitudes, brand recognition, brand attitudes and purchasing intentions. The moderating effect of the level of consumer involvement was significant in the ‘Review Attitude-Brand Attitude’ and ‘Brand Recognition-Brand Attitude’ pathways, But not in the ‘Brand Attitude-Purchase Intention’ pathways. This study used existing Advertisement‘s effectiveness theory to analyze the Effect of influencer reviews on consumer attitudes. And we can provide future studies related to influencer marketing with stereoscopic view to understanding Influencer Marketing by establishing a systematic framework.