To provide an evaluation method suitable for a method of screening a useful variety, according to a plant crossbreeding breeding method, which can evaluate the hereditary characteristic of pollen by the color for evaluating the hereditary characteristic of the pollen from color information on the crossbred pollen.

The color information on the pollen taken by a CCD camera (digital camera) is transformed into an XYZ color system according to the CIE (Commission Internationale de l'Eclairage) color system, the distribution of the pollen based on the color information is expressed by three-dimensional coordinates by an xy chromaticity diagram and a frequency, and the hereditary characteristic of the pollen is evaluated by the distribution diagram.