1. A sample observation method comprising a step of recognizing the image of an object in the transmission electron beam image of a sample by comparing it with a previously stored reference image; said sample observation method characterized by further comprising the steps of: specifying an object in said transmission electron beam image wherein multiple pairs of transmission electron beam images of multiple objects having a different tilt angle with respect to the optical axis are stored as said reference images for said objects; computing the correlation between said specified object image and said reference image; and displaying the result of computation.