With the advent of Age of Experience Economy and the rapid development of digital virtual technology, interactivity is gradually introduced and integrated into art design. Public urban artworks are becoming increasingly interactive, which brings more and more vitality to city space. Based on the clarification of the concepts of Interactive Design, Public Art and Interactive Public Art, the paper analyzes four features of Interactive Public Art: interactivity, technologicalness, dynamism and interestingness, and puts forward methods of the realization of interactive urban public art, including concept transition from concrete entity creation to experience-oriented design, method transition from individual creation to collective creation, and the introduction of digital virtual technology.