1. An image displaying system, comprising: an image device receiving an external image message; a first carrying device with one surface thereof denting inwards to form an accommodating space, the first carrying device including an imaging assembly pivotally disposed at one end and a virtual-image imaging assembly pivotally disposed at an opposite end; and a second carrying device with one surface denting inwards to form a storage space; wherein, when the image device is detachably coupled to the accommodating space and triggered, the image device transforms the external image message into a reversed image message and then projects the reversed image message to the imaging assembly, and the virtual-image imaging assembly maps the reversed image message of the imaging assembly so as to produce a first image; alternatively when the image device is detachably coupled to the storage space, the image device projects the external image message to a target so as to produce a second image.