Aims: Because low levels of maternal knowledge can cause stunting, developing an education system and web-based stunting anticipation system is needed to increase mothers' ability to improve stunting prevention efforts. This study aimed to evaluate the effectiveness of the Education System and Stunting Anticipation on mothers' knowledge, attitudes, and practices in preventing stunting in Pekanbaru City.

Materials & Methods: This research adopted a quantitative analytic approach using a quasi-experimental pre-and post-test design with controls. The study was conducted in the working area of Rejosari Health Center for the intervention group and Sapta Taruna Health Center for the control group from April to July 2022. There were 148 mothers in each group. The intervention group received exposure to the Education System and Anticipation of Stunting. The Wilcoxon and Mann-Whitney tests were used to analyze data.

Findings: Before the intervention, the mean ranks of knowledge, attitude, and practice were 27.47, 51.39, and 30.88, respectively. After the intervention, the mean ranks of knowledge, attitude, and practice reached 71.50, 61.46, and 35.54, respectively. The increase in scores in the intervention group was significantly higher than the control group (p<0.001).

Conclusion: Implementing the Stunting Education and Anticipation System effectively increases mothers' knowledge, attitudes, and practices in stunting prevention.