EVALUATION METHOD

An evaluation system for evaluating a vertical-direction height of each of a plurality of module mounting surfaces of a mounting base, the plurality of module mounting surfaces allowing a plurality of solar cell modules to be attached thereto, the evaluation system including: a height measurement device including a laser radiation unit configured to be mounted on a reference surface of the mounting base and radiate a laser beam, and a measurement unit configured to be mounted on the module mounting surface; and a data processing device configured to process a result of measurement by the height measurement device, wherein the measurement unit includes a light receiving unit configured to receive a laser beam radiated by the laser radiation unit, and a calculation unit configured to detect the vertical-direction height of the module mounting surface on the basis of a reception position of the laser beam in the light receiving unit, and the data processing device outputs, for each of the plurality of module mounting surfaces, a height adjustment value so as to allow light receiving surfaces of the plurality of solar cell modules to form one flat surface, on the basis of respective differences between the vertical-direction heights of the plurality of module mounting surfaces detected by the calculation unit and a predetermined reference height in a vertical direction.