A particle sorting method may more quickly and more reliably obtain image data in which particles suitable for evaluation has been imaged. The particle sorting method includes: a process (a) of collecting, as a particle sample, some of particles contained in a pulverized clinker or a cement particle group, and mixing the particle sample with a predetermined solvent to prepare a suspension; a process (b) of pouring the suspension into a flow path that has been predetermined, and imaging the suspension flowing through the flow path to obtain sorting image data; and a process (c) of applying the sorting image data to a first learned model, and sorting the sorting image data according to a type of an imaged particle, the first learned model being generated by performing machine learning based on first training input data is associated with a feature parameter serving as a reference.