This study proposes servant leadership for the formation of relationships between church workers and Christian adolescents and the development of spiritual maturity. It also examines the significant results regarding the spiritual maturity of church workers and Christian adolescents within the church community through the mediation of positive life evaluation. The study analyzes the differences and relationships between pastors, evangelists, teachers as church workers, and middle school and high school students as Christian adolescents. It verifies the impact of servant leadership on the spiritual maturity of Christian adolescents through examining the influence on them. To achieve the research objectives, a structured questionnaire was used for a self-administered survey. The survey targeted 500 church workers and Christian adolescents, and out of the collected 500 questionnaires, 451 valid samples were used as the final research subjects. Descriptive statistics, t-tests, ANOVA analysis, reliability and validity analysis, and correlation analysis were conducted using the statistical package SPSS 21.0 to understand the demographic characteristics. The results of the study show that there is a significant positive correlation between servant leadership of church workers and the spiritual maturity and positive life evaluation of Christian adolescents. In the era of the rapid changes brought by the post-COVID-19 new normal, church workers from the older generation and Christian adolescents referred to as Generation Z are requesting leadership necessary for the unstable and rapidly changing times. Christian adolescents seek a life characterized by positive evaluation amidst societal changes, including a balance between work and life, pursuit of ethical and moral life, opportunities for continuous learning and growth, a life where fairness and transparency are guaranteed to members, personal values and autonomy, a life that respects diversity, and a life that offers experiences and adventures. Filling these needs, servant leadership among church leaders and workers is shown to be necessary for increasing spiritual maturity and positive life evaluation. Servant leadership focuses on serving others rather than personal success, helping others' growth, and assisting in finding meaning in life, making it an optimal form of leadership. The level of servant leadership among church workers in the Korean church will enhance the sense of stewardship and community consciousness, and it will influence the spiritual maturity and positive life evaluation of Christian adolescents, who are considered the next generation of the Korean church.