A method for digitizing a bone marrow smear, comprising the steps of: obtaining medical record information related to a bone marrow physical smear; generating a global image of the bone marrow physical smear; generating a to-be-digitized region of the bone marrow physical smear, an amount of nucleated cells to be collected, and an amount of megakaryocytes to be classified; generating a digital label of the bone marrow physical smear; printing and pasting the digital label on a specific area of the bone marrow physical smear that corresponds to the digital label; repeating steps to until all digital labels of the bone marrow physical smear are generated and pasted; loading the bone marrow physical smear with the digital label into a slide box; loading the slide box into an entrance of a bone marrow cell scanning device; transferring the slide box to a loading position of the bone marrow cell scanning device; confirming and recording a position of the bone marrow physical smear in the slide box through infrared scanning the structure of the slide box; transferring the bone marrow physical smear from the slide box to a stage of the bone marrow cell scanning device; reading the digital label of the bone marrow physical smear; switching the bone marrow cell scanning device to low magnification to scan the to-be-digitized region generated in step, and labeling and identifying a target observation object in the to-be-digitized region; generating a stitched image of the region scanned in step; switching the bone marrow cell scanning device to high magnification to scan megakaryocytes, and labeling and identifying the scanned megakaryocytes, the amount of the scanned megakaryocytes being the same as the amount of megakaryocytes to be classified generated in step; generating images of the megakaryocytes scanned in step; adding special mirror oil to the bone marrow physical smear; switching the bone marrow cell scanning device to oil mirror to scan nucleated cells, and labeling and identifying the scanned nucleated cells, the amount of the scanned nucleated cells being the same as the amount of nucleated cells to be collected generated in step; generating images of the nucleated cells scanned in step; generating a digital smear of the bone marrow physical smear; transferring the bone marrow physical smear from the stage to the slide box; repeating steps to until all of bone marrow physical smears in the slide box are scanned to generate digital smears; transferring the slide box from the loading position to the entrance of the bone marrow cell scanning device; and taking out the slide box. obtaining medical record information related to a bone marrow physical smear; generating a global image of the bone marrow physical smear; generating a to-be-digitized region of the bone marrow physical smear, an amount of nucleated cells to be collected, and an amount of megakaryocytes to be classified; generating a digital label of the bone marrow physical smear; printing and pasting the digital label on a specific area of the bone marrow physical smear that corresponds to the digital label; repeating steps to until all digital labels of the bone marrow physical smear are generated and pasted; loading the bone marrow physical smear with the digital label into a slide box; loading the slide box into an entrance of a bone marrow cell scanning device; transferring the slide box to a loading position of the bone marrow cell scanning device; confirming and recording a position of the bone marrow physical smear in the slide box through infrared scanning the structure of the slide box; transferring the bone marrow physical smear from the slide box to a stage of the bone marrow cell scanning device; reading the digital label of the bone marrow physical smear; switching the bone marrow cell scanning device to low magnification to scan the to-be-digitized region generated in step, and labeling and identifying a target observation object in the to-be-digitized region; generating a stitched image of the region scanned in step; switching the bone marrow cell scanning device to high magnification to scan megakaryocytes, and labeling and identifying the scanned megakaryocytes, the amount of the scanned megakaryocytes being the same as the amount of megakaryocytes to be classified generated in step; generating images of the megakaryocytes scanned in step; adding special mirror oil to the bone marrow physical smear; switching the bone marrow cell scanning device to oil mirror to scan nucleated cells, and labeling and identifying the scanned nucleated cells, the amount of the scanned nucleated cells being the same as the amount of nucleated cells to be collected generated in step; generating images of the nucleated cells scanned in step; generating a digital smear of the bone marrow physical smear; transferring the bone marrow physical smear from the stage to the slide box; repeating steps to until all of bone marrow physical smears in the slide box are scanned to generate digital smears; transferring the slide box from the loading position to the entrance of the bone marrow cell scanning device; and taking out the slide box.