Google Maps is widely used in map information-based programs because of its abundant map resources. Unity has become a popular choice in the development of 2D and 3D programs in recent years because of its easy operation and high rendering performance. Although Google provides application interfaces for Google Maps, these interfaces cannot be used directly in Unity. Therefore, how to realize the visualization and interaction of Google Maps in Unity becomes a difficulty in developing application based on Google Maps in Unity. In order to solve the above problem, this paper proposes a method of visualization and interaction Google Maps in Unity. Raw Image component is used as the visualization object of map tiles, and the visualization of Google Maps is realized by orderly splicing of multiple map tiles. When interacting with Google Maps, map tiles are updated according to mouse operation to realize translation and zooming of Google Maps. The experimental results show that the proposed method can effectively display, translate and zoom Google Maps, and can be used to develop programs based on Google Maps.