A panum's area measurement method includes: projecting a first parallax image of a spatial object to the left eye of a user under test, and projecting a second parallax image of the spatial object to the right eye of the user under test, the first parallax image comprising a first homologous point and the second parallax image comprising a second homologous point； adjusting a horizontal parallax amount between the first homologous point and the second homologous point until the user under test observes the spatial object producing a ghost； acquiring a parallax amount parameter Δ；ne； calculating a horizontal physical spacing Δ；x between the first homologous point and the second homologous point based on the parallax amount parameter Δ；ne； and calculating a panum's area range (μin, μout) of the user under test based on the horizontal physical spacing Δ；x.
