Exercise can enhance cognitive function, improve emotional well-being, prevent various physical and mental illnesses, ultimately promote mental health. Expert teams have seamlessly integrated digital technology with measurements of psychological tests in the framework of exercise psychology to design and implement the Digital "Exercise Psychologist" System. This system consisted of psychological measurement module and intervention module towards school children and adolescents. It can assess the mental health of children and adolescents through customized evaluations, and provide personalized exercise training recommendations based on the evaluation score, with the ultimate goal of promoting mental health.