The present disclosure relates to an image display apparatus and a method thereof. The image display apparatus according to an embodiment of the present disclosure comprises: a display panel; a panel temperature sensor configured to detect a temperature of the display panel; and a controller configured to: first check a state of the display panel; perform a primary afterimage compensation on the display panel based on a result of first checking the state of the display panel; monitor the temperature of the display panel through the panel temperature sensor when the primary afterimage compensation is performed; secondly check the state of the display panel when the temperature of the display panel is less than or equal to a predetermined reference temperature; and perform a secondary afterimage compensation on the display panel based on a result of secondly checking the state of the display panel.