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A variable concentrate feeding system for individual dairy cow was developed. The system identified the dairy cow with the RFID technology. According to the differences of the basic diet intake and the individual milk yield, the system could automatically and quantificationally discharge and mingle four kinds of the different concentrates feeds. The experimental results indicated that the response time was 1.47s, the time for discharging compensated feeds was 15.15s, the time to open the railing of the entrance guard was 3.92s, the reading distance of the RFID reading system was 52.3cm, the alarm level height was 21.5cm, the identification accuracy of cow was 100%, and the four kinds of concentrates were mixed well, the measurement error was less than 5%, which could satisfy the demands of feeding. Moreover, the system can query and print feeding information online.