In this way, the store consists of two parts. The first part is the store showcase that the user has permission to enter, and the second part is the store warehouse that the user does not enter. The user enters into the store from the entrance door and will be accepted by the acceptance device in an arbitrary manner. Then, he/she goes to goods showcase sector and pre-orders goods with any desired method. Upon completion of this step, costumer returns to acceptance device to finalize order and payment, the same can be done by previous device. But to prevent crowding, two devices can be installed. At this stage, the ordered item from shelves of the warehouse is automatically transferred to the conveyor and shipped to the delivery point.