A new, simple method of counting and segmenting cell image is suggested in this paper. It is based on the feature of cell's logical and morphological iafornmation. By using of mathematics, n, morphological, logical operation and laplacian fiter, the method is realized with the MATLAH 5.10. The segment effect of this algorithm is tested with blood cell image in this article and the result is desirable, Particularly this method can count the number of blood cells. However, this counting is not very accurate, but it is enough for biological research of cytologlcal count. At the same time this method can segment special blood cell from its neighhorhood, which is very important for the development of image scgment technology, because traditional image segment method is inadequate to achieve such segment and count of calls.