Attention plays an important role to children’s study. From existing data of worldwide, the prevalence rate of Attention-Deficit / Hyperactivity Disorder (called ADHD) is about 5 % to 12 %, the prevalence rate is 5-7% in Taiwan. The ratio between boys and girls in this ADHD is four to one. The data of academic year 106 from department of education showed the number of students in high schools and elementary schools are 2 million, and there are 100000~140000 students with ADHD. The hidden case may more than these numbers. The application of assistive technology is valued in children’s learning based on executive function, but the internet addiction limits the popularization in learning performance. The attention screen and training in early intervention is one of the main function in child psychiatry. Therefore, this study will use system theory to develop attention assessment software with a comprehensive, professional and continuous support team. The present team work included, first develop attention assessment software.