A smart musical instrument system for replaying user performance with auto-play, electronic sound source or video, the system may include a musical instrument, a plurality of sensors, and a processing device. The plurality of sensors may be configured to obtain performance data of a user. The plurality of sensors may include a first sensor configured to obtain first performance data of the user. The performance data may include the first performance data indicating operations of a musical instrument. The processing device may be in communication with the plurality of sensors. The processing device may be configured to compare the performance data with reference music data to generate a comparison result and generate feedback based on the comparison result.