As the rapid progress of science and technology, the combination of technology and art has brought great innovation to art creation. Multimedia art has become an important part of modern visual art. At the same time, advances in science, technology and culture have changed the concept and methods of education. The new curriculum standards promote students’ innovation and life skills, and encourage multimedia integration into art courses. In order to improve students’ digital media literacy and better meet the social development of the 21st century, art teaching has actively updated its educational philosophy and gradually added courses in photography, computer drawing and design, and personalized animation. Adding 3D printing and other teaching contents to the school art classes and integrating multimedia technology into the art classes would help enhance students’ aesthetic ability and promote the progress of art education in colleges and universities. In the process of development and improvement of multimedia teaching mode, how to control the quality of online teaching for students and teachers is also an essential topic of academic research in advanced education. This paper used image processing technology to study the application of multimedia assisted instruction technology in art teaching. This paper first introduced the application of image processing technology in teaching, including face recognition sign in, student behavior monitoring in class, etc. Then, this paper studied the use of multi-media teaching technology applied in art teaching. The advantages of multimedia teaching technology in art teaching were discussed, and suggestions were made on the methods of applying multimedia teaching technology in art teaching. The experiment part studied the effect of multimedia teaching technology. The research results showed that multimedia teaching technology can greatly improve the classroom content and classroom effect of art teaching, enhance students’ interest in art learning, and greatly improve students’ comprehensive quality and art ability. The students who use multimedia teaching technology have an art ability of more than 85 points, which is far higher than the students who use traditional teaching, indicating that multimedia teaching technology can be well applied to art teaching.