A streaming accelerator includes a first pool, a first switch bus, a second pool and a second switch bus. The first pool includes neural processing unit (NPU) bundles, and each of NPU bundles includes a plurality of NPUs. The first switch bus provides a first streaming data to a first selected NPU bundle and a second selected NPU bundle respectively. The second pool includes network interface card (NIC) bundles, and each of the NIC bundles includes an encoder and a NIC. The second switch bus provides a first intermediate streaming data and a second intermediate streaming data to a first selected NIC bundle and a second selected NIC bundle. The first selected NIC bundle encodes the first intermediate streaming data to generate a first encoded streaming data. The second selected NIC bundle encodes the second intermediate streaming data to generate a second encoded streaming data.