Piano education for children is based on the child's psychological characteristics and the artistic characteristics of musical works. Piano initiation education for young children can enhance perception, aesthetic ability, and creative skills; promote the overall development of children; and is also a crucial channel to promote young children to develop and transfer their own musical experience. This paper analyzes the current problem of cultivating children's musical aesthetic ability in piano initiation education and proposes the use of multimedia and artificial intelligence technology to compare the repertoire played by piano learners with the original repertoire, combined with aesthetic evaluation technology to analyze and give guidance for piano initiation practice, so that piano learners can be more targeted. The program is designed to solve the problems in the piano practice process, to enhance the musical perception and aesthetic feeling of children, and to improve their aesthetic ability.