The purpose of this study was to research the effects of the method of mentor coaching using the TREASURE Talk Coaching Model on parents’ communication skills. A total of 10 early childhood parents were divided into the experimental group and the control group, and CICAIO(Coaching Inventory Child-Adult Interaction Through Observation) was carried out. This study used non-parametric statistics to verify the quantitative effect and conducted the Mann-Whitney U test to verify the Breslow-Day test for the interaction level between the experimental group and the control group. Also, differences between the pretest and posttest for the experimental group and the control group for education and training were analyzed using Wilcoxon verification. The training and educational contents for the experimental group were transcribed to verify the qualitative effects, and the contents was analyzed according to content analysis presented by Bogdan. The results show that the interaction level of the parents belong to the experimental group was statistically significant (Z=-2.02 p <.05). A total of 50 videos and transcribed data used for the verification of qualitative effects were categorized primarily as verbal and nonverbal interaction, and the subcategories are as follows: Four verbal interactions (Describe, Ask, Express thinking and feeling, Praise and Celebrate) and three nonverbal interactions (Body contact, Eye contact, Gesture).