In a method of breast cancer risk assessment, a computing device is configured to perform the steps of: obtaining a slice image of a tissue slice of a subject, the slice image indicates multiple cells, multiple target chromosome signals, and multiple target protein signals contained in the tissue slice; for each cell, obtaining a target protein signal quantity located in the cell, a target chromosome signal quantity located in the cell, and a signal quantity ratio; sorting the cells according to the signal quantity ratio to obtain a number N of key cells; and obtaining an assessment result indicating the subject’s risk of breast cancer based on the target protein signal quantity and the target chromosome signal quantity of all key cells. |