The objective of this research was to: 1) involved a survey of information relating to secondary school health, 2) involved the construction of a model of health assessment and a handbook for using the model in secondary school, 3) develop an assessment model for secondary school. The research included 3 phases. (1) involved a survey of information relating to secondary school health, which was performed by analyzing the approach and reviewing the related literature. The phase also involved synthesizing the factors associated with health in secondary school. (2) involved the construction of a model of health assessment and a handbook for using the model in secondary school. (3) the health assessment model for secondary school was applied to large, medium, and small schools to evaluate the model's validity. In addition, the assessment model was evaluated based on its utility, feasibility, propriety, and accuracy. The research findings suggested the following: 1) The health assessment model for secondary school consisted of 4 major factors, 13 sub-factors, and 68 indicators; 2) The health assessment model for secondary school was deemed by experts to have content validity; and 3) The health assessment model for secondary school was considered to have high levels of utility, feasibility, propriety, and accuracy. Considering each aspect, it was found that the aspects of utility, feasibility, propriety, and accuracy, were "High" for every aspect.