Organizational justice pertains to the perception of fairness experienced by individuals within an organization, encompassing four dimensions: procedural justice, distributive justice, leadership justice, and informational justice. To obtain the data a questionnaire survey on 432 primary and secondary school teachers was conducted to understand their sense of organizational justice, professional achievement, and work engagement. The research results found that (1) there is a significant positive correlation between organizational justice and teacher work engagement, with organizational justice also serving as a substantial predictor of this engagement level; (2) the sense of professional achievement is significantly positively correlated with the level of teacher work engagement, and it significantly predicts the level of teacher work engagement; and (3) organizational justice indirectly affects teachers' level of work engagement through the mediating effect of professional achievement. Research suggests two strategies to enhance primary and secondary school teachers' sense of organizational justice and professional achievement, thereby improving their work engagement levels.