According to the present invention, a method of recrystallizing an organic material for an OLED using ionic liquid comprises the steps of: (S110) sequentially inputting an organic material for an OLED, ionic liquid (first solvent), and a second solvent into a container and then completely dissolving the organic material in a solution where the ionic liquid and the second solvent are mixed; (S120) gradually heating the solution to a temperature of the boiling point (BP) of the second solvent or higher to evaporate all of the second solvent; and (S130) gradually cooling down the ionic liquid to recrystallize the organic material dissolved in the ionic liquid to precipitate the same.
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