Objective: In order to explore the development of self-evaluation and the relationship between the self-evaluation and the academic achievements. Method: About me Questionnaire and Strength and Difficulty Questionnaire (SDQ) were employed to measure the self-evaluation. The academic achievement was measured by the scores of Chinese, Maths, and English. Correlation and regression analyzes were conducted. Results: (1) it showed that the junior high school students’ academic self-concept was better than that of the senior high school students’; (2) There was statistically significant positive correlation between self-evaluated academic effort and academic achievement, and the statistically positive correlation between self-evaluated academic competence and academic achievement was also found. Furthermore, self-evaluated academic competence could predict the academic achievement better positively. As for SDQ, only could the total score of SDQ predict Maths score negatively. Conclusion: There were differences in self-evaluation with different grade students, however, the junior two students’ scores in most aspects were all higher than other grade students; the academic achievement could be better predicted by academic self-evaluation and gender, whereas the relationship between SDQ and academic achievement was weak in this study. However, the Maths score could be negatively predicted by the total score of SDQ.