A system of packing for turnkey services. An input port receives first and second wafer lots from a semiconductor manufacturer. The first wafer lot comprises a first number of dies, and the second wafer lot comprises a second number of dies. A packing device loads dies of the first wafer lot in a provided carrier having a preset capacity, and each of the loaded carriers is filled to capacity. A controller determines whether there is a remaining die of the first wafer lot that cannot fill one of the carriers, and directs the packing device to load the remaining dies of the first wafer lot and dies of the second wafer lot sequentially.