The environmental simulation of the built environment in the remote hillside area has always troubled planners. It is not only the difficulty of surveying and mapping the built environment, but also the difficulty of 3D modeling and environmental simulation, which highlights the dilemma of planners and designers. Therefore, this paper attempts to make use of the built environment in the remote area to carry out 3D modeling with UAV tilt photography, so as to apply it to the environment simulation, and to develop a set of simple methodology for planning designers’ reference. The research results are: 1. Establish the methodology of the built environment simulation in the remote area; 2. Through the field case analysis of Yangmingshan Chinese Culture University as an example, verify the feasibility of the construction of the 3D model and the physical environment simulation methodology in the remote mountain area. Finally, discuss the application of this methodology.