Abstract: Abstract：At present, Virtual Reality technology in the application of the garden is only in the exploration period, with the improvement of computer software and hardware equipments and the progress of visualization technology, the application and influence on garden are increasing broad. The article toke a city square garden design as the example and developed garden roam system with Quest3D. It introduced the design process of garden system and researched on landscape scene modeling, plant model and water model control, light and shadow setting, camera setting and other issues. It discussed the application of Quest3D in landscape design, studied the technology of interactive display in landscape and gave a very comprehensive explanation of methods and process about creating a garden system. It offered an efficient way to display the landscape design.