The invention discloses an unmanned vending device, a goods exhibiting method for the unmanned vending device and a control system. The goods exhibiting method includes the steps of obtaining weight information of a current placed object when the object is placed on the unmanned vending device, judging whether the weight information of the current placed object is the same as the weight information of a previous placed object or not, prompting a user to change the balance weight of the current placed object when the weight information of the current placed object is the same as the weight information of the previous placed object, and establishing the correspondence between the current placed object and the weight information obtained after the balance weight is changed after the balance weight of the current placed object is changed.