In this study, it was intended to examine which images of the brand influence consumers brand expansion assessment and how it affects them. The original brand image was divided into three factors: brand credibility, awareness and familiarity. As a result of the analysis of the effect of trust, awareness, The value of R2, which is the coefficient of determination, is 0.362, indicating that the explanatory power is 36.2%. As a result of analysis of the effect of reliability, awareness, and familiarity on purchase intention, R2 of the decision coefficient is 0.417, indicating that it has explanatory power of 41.7%.. Therefore, it was confirmed that reliability has the greatest influence on purchase intention through standardized beta coefficients, followed by familiarity and awareness. The extent to which the expansion brand has an effect on its favourability and willingness to purchase has been shown in order of reliability, familiarity, and recognition. In conclusion, the more positive the image of the original brand is perceived by consumers, the more positive the Extended Brand will have.