Provided is a credit-based multipath data transmission method for load balancing of a data center network, the method comprising the steps of: transmitting a credit request packet to a receiver device; in response to the credit request packet, determining at least one first path along which credit packets can be received earliest from the receiver device, among all the communicable paths to the receiver device; each time that a credit packet is received through the first path from the receiver device, transmitting a data packet to the receiver device through the first path in response to the credit packet, wherein the credit packets received through the first path are in one-to-one correspondence with the data packets transmitted to the receiver device through the first path; and when there are no more data packets left to transmit to the receiver device, transmitting a credit stop packet to the receiver device.
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