1. A medical image display system, comprising: a medical image generation apparatus, including: a four-dimensional image data generation circuit generating four-dimensional image data composed of a plurality of three-dimensional image data blocks each having information indicating a number in chronological order of the three-dimensional image data blocks by using image information acquired by taking images of an object; a memory storing the four-dimensional image data generated by the four-dimensional image data generation unit; and an image generation circuit generating movie data composed of a plurality of two-dimensional image data blocks generated from the plurality of three-dimensional image data blocks constituting the four-dimensional image data stored in the memory, and generating relevant information associating each of the two-dimensional image data blocks constituting the movie data with one of the three-dimensional image data blocks which is a source of the blocks of two-dimensional image data; and a medical image display apparatus connected to the four-dimensional image data generation circuit, the memory, and the image generation circuit through a network, and displaying the two-dimensional image data blocks and the three-dimensional image data blocks, wherein when one of the two-dimensional image data blocks is identified in the movie data at the medical image display apparatus, the three-dimensional image data block corresponding to the identified two-dimensional image data block is read based on the relevant information through the network, and the read three-dimensional image data block is displayed on the medical image display apparatus.