Embodiments of a die stacking apparatus are provided. The die stacking apparatus includes a storage device configured to contain a top wafer and an interposer wafer. The top wafer has a number of top dies, and the interposer wafer has a number of interposer dies. The die stacking apparatus also includes a carrier device configured to carry the interposer wafer, and a transferring device configured to transfer the interposer wafer to the carrier device and to dispose the top dies on the interposer dies. The die stacking apparatus further includes a process module configured to control the transferring device. The process module controls the transferring device to transfer the interposer wafer to the carrier device, and controls the transferring device to dispose the top dies on the interposer dies of the interposer wafer, which is stacked on the carrier device.