An OCT motion contrast data acquisition method using an optical coherence tomography device includes: controlling an optical scanner for scanning measurement light on a test subject； performing a first scanning control for obtaining a first OCT signal group including at least four temporally different OCT signals at a same scanning position； performing a second scanning control for obtaining a second OCT signal group including at least four temporally different OCT signals at the same scanning position； obtaining first motion contrast data based on the first OCT signal group obtained in the first scanning control； obtaining second motion contrast data based on the second OCT signal group obtained in the second scanning control； and obtaining third motion contrast data based on the first motion contrast data and the second motion contrast data.
