Abstract To promote the development of sexuality education for Chinese adolescents, the study analyses Ireland s relationships and sexuality education (RSE) curriculum and concludes that it centers on student development in terms of curriculum philosophy and objectives, emphasizing its educational value. At the content level, it employs a staged teaching approach to achieve comprehensive coverage based on students physical and mental development characteristics. In terms of implementation, it adopts a spiral organization to ensure the scientific integrity of the curriculum. In addition, it utilizes diverse evaluation methods to strengthen the systematic nature of the curriculum. Based on these insights, China could collaborate with multiple stakeholders to advance the development of RSE, establish a scientific and systematic framework for RSE, and constructing a comprehensive implementation and teacher support system, thereby promoting the refinement and innovation of RSE programs.