1. A portable device comprising: an image pick-up means for taking an image of an observation object or a vicinity of the observation object so as to obtain a taken image; a display means for displaying the taken image; a first acquiring means for acquiring an observation result obtained by observing the observation object in the taken image, when the image pick-up means takes the image of the observation object or the vicinity of the observation object; a second acquiring means for acquiring state representation information that represents a present state of the observation object in accordance with the observation result; and a display control means for displaying the state representation information and the observation object in the display means.