Abstract: The correctness and reliability of finite element (FE) model is crucial to ensure structural simulation to fulfill its purpose. This work introduces the FE modeling techniques and model updating for outdoor unit of conditioner (OUC). The FE model of OUC must reveal the reality of structure, including geometry, material, interface and boundary conditions, and to be validated by experiments. The general approach is to perform experimental modal analysis (EMA) on the real structure and obtain structural modal parameters. At the meantime, the structural modal parameters can be numerically obtained from FE model. Model updating is to adjust the FE model such that both FE model and real structure are equivalent based on the agreement of structural modal characteristics. Results show the updated FE model of OUC can reveal good agreement with real structure in modal and frequency domain properties.