The invention discloses a system and method for scoring piano performance, and relates to the field of music. The system particularly comprises a microphone, a storage chip, a central processing unitand a display screen, wherein the microphone is electrically connected with the central processing unit, the storage chip is electrically connected with the central processing unit, and the display screen is electrically connected with the central processing unit. In the using process of the system, a computer algorithm model is adopted to give a score, so that subjective factor deviation caused by personal difference of a grader in a manual scoring mode is avoided; and a computer algorithm model is adopted to give a score, so that necessary scores can be provided for piano learners to practice themselves under the condition that a piano teacher is absent.