The invention discloses a verification method and device for the vertical installation reliability of a double-sided assembly. The verification method comprises the steps that a verification device isarranged on the double-sided assembly, a thermocouple temperature measuring line, a photosensitive sensor, a light source and a strain gauge of the device are respectively arranged on the double-sided assembly, and then temperature change data, surface deformation data and wind pressure data on the double-sided assembly are respectively measured by utilizing the thermocouple temperature measuringline, the photosensitive sensor and the strain gauge and are transmitted to an industrial personal computer through a data collector; and an alternating-current distribution box and a photovoltaic inverter respectively transmit the generated energy data of a photovoltaic power supply generated by a photovoltaic module to the industrial personal computer. According to the verification method, thethermocouple temperature measuring line is adopted to directly collect real-time temperature changes of the surface of the assembly, the verification operation is simplified, the strain gauge, the photosensitive sensor, the photovoltaic inverter and the alternating-current distribution box are utilized to monitor wind pressure borne by the double-sided assembly outdoors, assembly surface deformation and generating capacity data in real time, and the accuracy of reliability verification is improved.