At present, the call for information reform in education teaching is increasing, and art education is also facing the demand for online. This paper analyzes the demand for online art education according to the characteristics of existing online education, proposes an online education system based on virtual simulation technology for the special needs of art education, and studies the structure distribution of learning resources, teaching organization and online teaching practice under 3D virtual simulation scenarios respectively. At the same time, a virtual simulation explanation robot is added using Unity3D technology to realize online learning interaction in art education. In the continuity test of the system, the system throughput per second accounted for 42.31% of the maximum throughput on average, with the lowest accounting for only 28.65% and the highest accounting for 56.98%, and the operating efficiency of the system met the teaching needs of art education. In the concurrency test, the success rate of system interface calls remained above 80% as the number of concurrent users increased. In practice, the overall satisfaction rate of students with the art online education system reached 88.3%. The system in this paper can enhance the interest in art teaching and provide a feasible new path for the development of art education in the information era.