Abstract: A particle analysis system comprising: a light detector that acquires light generated by irradiating a particle with excitation light; and an information processing unit that outputs a spectral plot including spectrum information of an autofluorescence population specified in a two-dimensional plot of measurement data each of which corresponds to the acquired light and spectrum information of the measurement data and that records the spectrum information of the autofluorescence population as an autofluorescence reference spectrum in a fluorescence separation process.

Abstract: There is provided an information processing apparatus including: an information storage unit that stores a result of sensing light from cells, namely first data, and a result of separating the first data into a plurality of fluorescences, namely second data, in association with each other; a clustering unit that clusters the cells into a plurality of clusters on a basis of the second data; and an output unit that outputs a clustering result from the clustering unit. The output unit additionally outputs at least one or more of the first data and the second data about the cells included in a cluster selected by a user from among the plurality of clusters.