Hot EF is a set of neurocognitive functions that contribute to children's ability to adapt and survive in emotionally challenging situations. Healthy children will be easily adjusted to new challenges to avoid behavioral and emotional problems during the pandemic. Unfortunately, research shows that no intervention can be used to develop early childhood hot EF. Therefore, this study aims to examine the effectiveness of online hot EF-based interventions on increasing hot EF and early childhood adjustment. A Between Subject Pretest-Posttest Control Group Design was applied in this study. This study was followed by 62 children who were randomly assigned into experimental and control groups. The experimental group received five individual online sessions for three weeks. Hot EF during pretest and posttest was measured using the Gift Delay Test, while adjustment was measured using Children Adjustment and Parent Efficacy Scales (CAPES). The result showed that the experimental group significantly increased hot EF and adjustment compared to the control group. It suggests that this online hot EF-based intervention could promote hot EF and adjustment in early childhood children and be utilized by parents or educators. © 2023 American Institute of Physics Inc.. All rights reserved.