This study examined the educational effectiveness of AI-based automated evaluation feedback tools in college writing courses. Amid active discussions on the use of AI in liberal arts education, the study applied AI automated evaluation tools to actual writing classes and analyzed the results. The findings show that AI feedback positively influenced students' motivation for writing and achieved a high level of satisfaction in areas such as spelling, vocabulary, grammar, and expression correction accuracy. AI automated evaluation feedback helps reduce the feedback burden on instructors and assists them in providing meaningful feedback to students. It is expected that AI-based automated writing feedback tools will contribute to fostering AI literacy. This case study is significant in that it offers insights for effectively incorporating AI automated evaluation feedback into college writing courses.