1. A microscope apparatus comprising: an image acquisition unit for acquiring a plurality of frame images while varying a plurality of parameters; an image saving unit for successively saving the frame images acquired by the image acquisition unit; a property-information saving unit for saving property information associating identifying information of the saved frame images with the parameters; a control unit for controlling the image acquisition unit, the image saving unit, and the property-information saving unit; a parameter specifying unit for specifying a desired parameter; an image extraction unit for extracting, from the image saving unit during the image acquisition, a frame image associated with the desired parameter specified by the parameter specifying unit; and a display unit for displaying the frame image extracted by the image extraction unit during the image acquisition, wherein the control unit saves updated property information in the property-information saving unit each time the frame images are saved in the image saving unit.