The invention discloses a method of viewing a 3D digital building by using virtual reality goggles. The method comprises the following steps: 1, 3D modeling software is used for making a 3D model, and a scene is built; 2, two cameras of two eyepieces of the virtual reality goggles are rendered; 3, the virtual reality goggles and a 3D engine synthesize resources; 4, several position switching 3D animation objects are set in the 3D engine, and coordinates of a switching object are set; 5, an animation object is played, a counter is set, and when the maximal value is achieved, an initial value is returned; and 6, a return key action is acquired, switching of a building roof or specified space is carried out; a left mouse key is acquired, the animation is played or the action is stopped; and a right mouse key is acquired, a computer power-off action is realized. The method of the invention can enable a user to be in a building sales office, the user can feel in an already-built or to-be-built real estate development project to view conditions of the overall building, the sense of reality and the sense of interest are strong, and experience is more profound.