A method of controlling a photographing apparatus including a main processor and an image processor, the method comprising: sequentially transmitting, by the image processor to the main processor, a plurality of pieces of transmission data, each comprising a piece of preview image data corresponding to a frame photographed through a photographing module, the pieces of preview image data comprising preview image data of a captured image and live preview image data, wherein at least one piece of the transmission data comprises: first live preview image data with respect to one frame, a block of image data (430, 440) of a captured image captured earlier than the first live preview image, the captured image being parallel-processed during the transmission of live preview image data of a live preview image captured earlier than the first preview live view image, and header data including an index of the block of image data and the number of blocks of image data for the captured image; and for each piece of transmission data: parsing, by the main processor, the header data of the piece of the transmission data, and determining whether the block of image data is included in the piece of the transmission data, extracting, by the main processor, the piece of preview image data from the piece of the transmission data, displaying the extracted piece of preview image data on a display portion of the photographing apparatus, and when the main processor determines the block of image data is included in the piece of the transmission data, storing, by the main processor, the block of image data in a memory. sequentially transmitting, by the image processor to the main processor, a plurality of pieces of transmission data, each comprising a piece of preview image data corresponding to a frame photographed through a photographing module, the pieces of preview image data comprising preview image data of a captured image and live preview image data, wherein at least one piece of the transmission data comprises: first live preview image data with respect to one frame, a block of image data (430, 440) of a captured image captured earlier than the first live preview image, the captured image being parallel-processed during the transmission of live preview image data of a live preview image captured earlier than the first preview live view image, and header data including an index of the block of image data and the number of blocks of image data for the captured image; and for each piece of transmission data: parsing, by the main processor, the header data of the piece of the transmission data, and determining whether the block of image data is included in the piece of the transmission data, extracting, by the main processor, the piece of preview image data from the piece of the transmission data, displaying the extracted piece of preview image data on a display portion of the photographing apparatus, and when the main processor determines the block of image data is included in the piece of the transmission data, storing, by the main processor, the block of image data in a memory. first live preview image data with respect to one frame, a block of image data (430, 440) of a captured image captured earlier than the first live preview image, the captured image being parallel-processed during the transmission of live preview image data of a live preview image captured earlier than the first preview live view image, and header data including an index of the block of image data and the number of blocks of image data for the captured image; and for each piece of transmission data: parsing, by the main processor, the header data of the piece of the transmission data, and determining whether the block of image data is included in the piece of the transmission data, extracting, by the main processor, the piece of preview image data from the piece of the transmission data, displaying the extracted piece of preview image data on a display portion of the photographing apparatus, and when the main processor determines the block of image data is included in the piece of the transmission data, storing, by the main processor, the block of image data in a memory.