Starting from the theoretical definition of positive feelings and uncertainty, this paper discusses the research in the embodiment of the principle of pleasure brought by uncertainty in daily life and discusses its feasibility. By analyzing the pleasure of uncertainty in the field of musical artistic expression and the connection between music and abstract painting, the author explores the causes of positive feelings from uncertainty in abstract painting and its application. Through creative practice and related material experiments, the author achieves the result that there is potential for viewers to get positive feelings after experiencing the uncertainty in abstract painting works. This study aims to explore the application of abstract painting in the field of art therapy through this series of investigations.