Modern exhibition art is gradually developing corresponding public art with the progress of the times. Nowadays, people's pursuit of contact with information is constantly improving. In the modern era of advanced information technology, public art is gradually changing the traditional habit of artistic expression with its unique charm and competitive advantage. This article takes the application of virtual reality technology in public art as the research goal, integrates virtual reality technology into public art, and studies the form and function of its expression. Through the sorting out of modern public art expression and its current situation, it is proposed to combine virtual reality technology with public art, change the expression of public art with the latest plans and technology, and explore new ways of public art innovation. This article studies the virtual reality technology and public art in detail, and specifically understands what virtual reality technology is and combines it with public art. Public art Public art has an unusual significance in the city's street landscape. It plays a vital role in the artistic atmosphere and atmosphere rendering of a city. It not only allows visitors to the city to experience the atmosphere of the city, but also Played a special role in undertaking culture. Experimental analysis and research show that the market scale of the delicate reality derived from the development trend of virtual reality and the type of service structure analyzed in this article broke through the tens of billions mark in 2018, and the future market scale is still Continuous growth. Among them, the types of services are divided into 7 parts. Among them, the service packaging part accounts for the largest market share, which accounts for 28.9% of the total market service share.