The study assessed the relationship among the factors of inhibition control, working memory and cognitive flexibility in relation to cognitive development of children. Total 30 children (17 male and 13 female) age group 6-7 years old (Mean =6.5 ; SD = 0.34) participated in the study. In this study, we used Stroop Task, saccadic test, and Simon Task Flanker Task to assess the inhibitory control. In addition, Working Memory Tasks, Cognitive Flexibility Tasks, and Cognitive Development scale assessed working memory, cognitive flexibility and cognitive development. It resulted that processing speed, selective attention, and automaticity factors of inhibitory control has significant relationship with cognitive development of children. Moreover, the timing and kinematics factors of inhibitory control assessed by Saccadic Task, found significant relationship with cognitive development. Not only was that but also the tendency to respond the stimulus has also significant relation with cognitive development that was assessed by Simon Task. Children's detection and recognition of target factor of inhibitory control was assessed by Flankar Task found significant relationship with cognitive development. As a whole processing speed, selective attention, automaticity, timing and kinematics, and tendency to response the stimulus factors were hierarchical related with cognitive development of elementary children.