Troll Online is a learning and education platform specially developed for toddlers and children. Various homework tasks in line with the school curriculum, such as: game-level review and acceptance, quiz system for re-practicing wrong questions based on assessment results, recording function for repeating text or watching videos to imitate voice intonation, reading books for self-learning ability Museum and an audio-visual classroom where rhythmic songs and animations are assembled. Through Troll Online, students can pass through task-based activities to make their learning more regular; the re-practice mechanism for wrong questions in the question bank can correct their concepts in time and make learning more effective. The rich animation game design makes the learning process more interesting; the gold coin reward mechanism makes the willingness to learn more durable.