The purpose of this study was to investigate the effects of elementary school students¡¦ moral characteristics and moral behaviors through a moral inquiry teaching. A nonequivalent pretest-posttest design was conducted on this study. Two investigator-developed instruments (i.e., ¡§School Students Moral Behavior Questionnaire¡¨ and ¡§Parenting practice Questionnaire¡¨) were conducted on both experimental and control group students during the pre- and post moral inquiry teaching. In addition, daily student behavior records and follow-up individual interviews with student, teachers, and their parents were collected to verify the quantitative results. The main findings from t-tests comparisons and ANCOVA analyses were as follows: 1. The posttest experimental group students¡¦ moral characteristics total scores were significantly higher than the control group¡¦s. 2. On the topic of ¡§responsibility¡¦¡¦, the experimental students agreed that being responsible in family matters positively correlates to moral behaviors. 3. On the topic of ¡§respect earth¡¦¡¦, the experimental students presented more respectful in their school areas ,but not in public districts. 4. On the topic of ¡§taking care of others¡¦¡¦¡GBefore the intervention, the experimental group students expressed more active cares to their parents, but not to their classmates. After 9 topic systematic inquiry teaching, students pay more attention on their classmates; therefore , the experimental group students obtain higher scores than control group. Implications for practice and research are provided.