Earth 3D app provides the following three functions. 1. Globe 1) You can zoom in or zoom out the 3D earth. 2) With the auto-rotate feature, the user can rotate the 3D earth. 3) Provides sevral eart texture and space texture. 4) Show the border of the countries. 5) You can see the country information by touching the flag of the country retrieved from the 3D earth 2. Map 1) Show the map together with the 3D earth. 2) You can move the map so that the three-dimensional region is moved together, so you can see the plane map and the three-dimensional region together. 3) Show the border of the country at the center of the map on the 3D earth. 4) When you search for a country, the flag will be displayed on the map, and country information can be found in the Wikipedia dictionary. 3. VR (Vurtual Reality) 1) You can choose from 4 different earth images. 2) When you move your gaze, the flag, name, and border of the country are displayed.