1. An automatic analysis device that mixes a sample and a reagent to measure temporal change of a mixed solution, the automatic analysis device comprising: a measurement point data acquisition unit that acquires a plurality of measurement point data from a reaction process of the sample and the reagent; a first storage unit that accumulates test values and parameters of approximate equations for approximating the plurality of measurement point data; a data processing unit that creates a distribution map of reference data corresponding to the parameters or the test values based on predetermined numbers of the parameters or the test values accumulated in the first storage unit; a second storage unit that stores a threshold for removal determination; an output unit that presents, on a display screen, removal data candidates included in the distribution map of the reference data based on the threshold; and a third storage unit that stores attached information of the reference data, the information including a determination result indicating whether data is to be removed from the distribution map of the reference data.