The dynamic change of thermoelectric parameters of the facade photovoltaic (PV) wall plays a key role in the improvement of its thermoelectric performance under the actual operating conditions. In order to assess the dynamic change characteristics under different external conditions and achieve accurate prediction, this study establishes a heat transfer model for facade PV walls, builds an experimental platform for facade PV system performance monitoring, quantifies the dynamic response process of the thermal and power generation performances of facade PV walls under actual operating conditions through multi-dimensional comparative tests under cloudy and sunny conditions, and analyses the differences in the thermoelectric performance under different climatic conditions, insolation intensities, and outdoor air temperatures. In addition, the dynamic prediction model for output performances based on solar irradiance, outdoor air temperature and thermoelectric data is constructed.