A method for analyzing biological-tissue image includes following steps. A plurality of biological-tissue images are provided, and each of the biological-tissue images includes a plurality of target object image blocks. An image pre-processing step is performed so as to obtain a plurality of processed biological-tissue images. A fitting step is performed so as to obtain a plurality of object fitting images of the target object image blocks. A sampling step is performed, wherein a target region of each of the processed biological-tissue images is selected, and the target region includes the object fitting images. A calculating and analyzing step is performed so as to obtain an analysis result of a target regional center of the biological-tissue images.