The study aims to analyze how Korean learners evaluate themselves in their learning process. First, self-evaluation is defined and categorized into self-concept, ownership, critical thinking, meta-cognition, and feedback. Second, the reflective writing materials produced by learners are analyzed, and the problems are classified according to the categories. The self-evaluation aspects in the writing materials are as follows. First, learners often form self-concept in the process of writing, which may lead to their lack of confidence and meta-cognition in writing. Additionally, in the process of writing, due to their inability to analyze problems based on critical thinking, it is difficult for learners to use the ownership strategy to solve problems, and self-evaluation eventually fails to achieve effective feedback. To improve self-evaluation ability, learners need to develop positive self-concept and meta-cognition and improve their ability to discover and solve problems by using critical thinking and the ownership strategy.