A packet transfer system includes a transmitter apparatus, a processing apparatus, a first transfer apparatus and a second transfer apparatus. The transmitter apparatus transmits a data packet including data and quality information associated with a transfer rate of the data. The first transfer apparatus performs a transfer process of the data packet received from the transmitter apparatus. The second transfer apparatus is connected to the first transfer apparatus through first and second routes, and transfers a data packet received from the first transfer apparatus. The first route is used for transferring a data packet including first quality information associated with a first transfer rate. The second route is used for transferring a data packet including second quality information associated with a second transfer rate. The second transfer apparatus releases the first route when reception of a data packet including the first quality information has been terminated.