Oral health is essential to good health because it determines whether nutrients are absorbed properly, which is key to children's physical development. Tooth decay is the biggest oral health problem in elementary school children in Taiwan and has demonstrated a high prevalence for years. Tooth decay is an irreversible process, the axiom "An ounce of prevention is worth a pound of cure" performs that oral care is vital to ensuring good health. The purpose of this study was to establish a set of objective and specialized assessment indicators. First, relevant literature data were collected and five assessment criteria were formulated based on collected data. Subsequently, a survey was conducted using a modified Delphi questionnaire to determine key factors influencing oral care practiced by elementary school children, after which a hierarchical structure was established. An analytic hierarchy process (AHP) was employed to analyze the samples to identify the weights and rankings of oral care-related factors.