We propose a microscope system for continuously taking the magnification images of a three-dimensional object by using a composite lens of a liquid crystal (LC) lens in addition to a relay lens and objective lens. The variable focal length of the composite lens can easily be controlled at the range of 3mm by applying the voltages to both a circularly hole-patterned electrode and external flat electrode of the LC lens without any mechanical movements. The depth properties of the object can be estimated by using a Laplacian-Gaussian filter process of the all focused images.