1. An electron microscope, comprising: an input unit for capturing image data on a microscopic image acquired by another electron microscope, a computation processing unit for generating a display signal based on said image data on said microscopic image acquired by another electron microscope and captured via said input unit and image data on a microscopic image acquired by said electron microscope itself, in order that said microscopic image acquired by another electron microscope and said microscopic image acquired by said electron microscope itself are displayed at said same scale and under said same display condition, and a display unit for displaying both of said microscopic images based on said display signal from said computation processing unit.