A: The fundamental purpose of teaching evaluation is to promote students' vivid, lively and active development. The evaluation method of art teaching is based on the characteristics of art teaching, emphasizing that the fundamental purpose of evaluation is to stimulate students' interest in learning art, master certain basic skills, and promote the overall improvement of students' ability and quality. Specifically. Teaching evaluation has the functions of guidance, diagnosis, encouragement and adjustment. Guiding function: teaching is a purposeful and planned activity, and teaching evaluation is a working process of detecting the realization of teaching objectives and making corresponding value judgments for improvement. Diagnostic function: Evaluation is an analysis process of teaching results and their causes, which enables us to understand all aspects of teaching and judge its effectiveness, defects, contradictions and problems. Incentive function: Evaluation can supervise and control the teaching process and promote and strengthen teachers and students. Adjustment function: the evaluation result must be a kind of feedback information. This information can make teachers know their teaching situation in time, and also enable students to gain experience of learning success or failure, thus providing objective basis for teachers and students to adjust their teaching behavior.