The present invention relates to an image processing apparatus and an image processing method. In an image processing apparatus, a first conversion unit converts, on the basis of an ICC profile corresponding to the input RGB image data color gamut, the RGB image data into a first Lab image data of Lab color space that is independent of an apparatus. A storage unit stores plural conversion profiles for converting using a color appearance model in the color space that is independent of the apparatus in correspondence with plural color gamut that is dependent on displayers. A selection unit selects a conversion profile corresponding to the color gamut of the input RGB image data, the color gamut of output CMYK image data, observation conditions of the input data and the output data. A second conversion unit converts, on basis of the selected conversion profile, the first Lab image data into a second Lab image data. A third conversion unit converts the second Lab image data into the output data on the basis of the ICC profile of an output device.