The present research aims to investigate the effectiveness of the educational package of moral concepts of Islamic religion based on mathematics on the moral intelligence of children aged 9 to 12 years. The research method was semi-experimental with a three-stage design (pre-test, post-test, follow-up) and three groups with a two-month follow-up period. The statistical population included 9-12-year-old girls with low moral intelligence who were studying and working in the academic year of 2021 to 2022 in Tehran. The research sample included 49 girls aged 9 to 12 years with low moral intelligence, who were selected by purposeful sampling and randomly placed in experimental and control groups. The children in the experimental groups received the educational package of moral concepts of Islamic religion based on concepts (12 sessions) and teaching philosophy to children (12 sessions) in one and a half months, while the control group received Waiting to receive the intervention and did not receive these interventions during the implementation of the research. The tools used included the moral intelligence questionnaire (Amini Moghadam, Rezaei and Makund Hosseini, 2017). Analysis of the data obtained from this research was done by SPSS software version 23. The content validity of the educational package of moral concepts of Islam was calculated based on sources using the valid conceptual coefficient and validity index, respectively, 0.73 and 0.86. The results showed that the educational package of moral concepts of Islamic religion has a significant effect on the moral intelligence of children based on concepts (P<0001; Eta=0.46; F=19.78).