In recent years, neurofeedback training becomes a gradual non-pharmacological treatment trend for attention-deficit/ hyperactivity disorder (ADHD) to improve attention. In this study, we design a 3D game to improve and assess children with ADHD. We observed the brainwave change to integrate computer game training to explore the impact of training on children. In the process of the training, children can learn to focus and relax. And then children can further to control attention and meditation, helping to improve the efficiency of their learning and inhibit the frequency of ADHD symptoms. After training, we record these data and analyze the parameters and brainwave status. In addition, we found the progress obviously on children with ADHD through the game training. The prosed scheme can give a feedback and improve children’s attention and meditation significantly.