A method of building energy simulation using bim

The present invention comprises the steps of generating a building information file by inputting the building shape and coded material information into the building information input program, loading the building information file in the middleware, mapping the loaded building shape and coded material information, And converting the mapped building shape and the encoded material information into a file for an energy simulation program. According to the present invention, the building shape input through the building information input program (program that supports BIM), coded material information, and coded real-world information is linked to the energy simulation program (Energy Plus, program according to ISO 13790). Energy can be simulated in the phase.