A medical image processing system comprising: a determining unit configured to, based on information related to a stereoscopic function of a display unit connected to an output target apparatus, determine a parallax image number for realizing a stereoscopic view on the display unit; a rendering processing unit configured to generate rendering images corresponding to the parallax image number, by performing a rendering process on volume data that represents three-dimensional medical images; and the system further comprising an input unit configured to receive the information related to the stereoscopic function of the display unit, wherein the determining unit determines the parallax image number, based on the information that is related to the stereoscopic function and is received by the input unit; wherein when there are a plurality of output target apparatuses, the determining unit is further configured to determine a parallax image number for each of the plurality of output target apparatuses, based on information that is received by the input unit and is related to a stereoscopic function of each display unit connected to an output target apparatus respectively, and the rendering processing unit being further configured to judge whether volume rendering images that match the stereoscopic function received by the input unit are present among already-generated volume rendering images for a display unit, and if the rendering processing unit determines that no volume rendering images match, the rendering processing unit performs a re-rendering process on the volume data based on information that is received by the input unit; an output unit adapted to output the rendering images simultaneously to a corresponding output target apparatus to realise a stereoscopic view on the connected display unit. a determining unit configured to, based on information related to a stereoscopic function of a display unit connected to an output target apparatus, determine a parallax image number for realizing a stereoscopic view on the display unit; a rendering processing unit configured to generate rendering images corresponding to the parallax image number, by performing a rendering process on volume data that represents three-dimensional medical images; and the system further comprising an input unit configured to receive the information related to the stereoscopic function of the display unit, wherein the determining unit determines the parallax image number, based on the information that is related to the stereoscopic function and is received by the input unit; wherein when there are a plurality of output target apparatuses, the determining unit is further configured to determine a parallax image number for each of the plurality of output target apparatuses, based on information that is received by the input unit and is related to a stereoscopic function of each display unit connected to an output target apparatus respectively, and the rendering processing unit being further configured to judge whether volume rendering images that match the stereoscopic function received by the input unit are present among already-generated volume rendering images for a display unit, and if the rendering processing unit determines that no volume rendering images match, the rendering processing unit performs a re-rendering process on the volume data based on information that is received by the input unit; an output unit adapted to output the rendering images simultaneously to a corresponding output target apparatus to realise a stereoscopic view on the connected display unit.