A compressor control apparatus for controlling the operation of two compressors, comprising: a first and a second alternating current switch (21, 22) configured to switch AC power applied to a first and a second compressor (C1, C2) based on a first and a second control signal; a first and a second current detection unit (611, 621) configured to detect a first and a second motor drive current applied to a first and a second motor provided in the first compressor and the second compressor (C1, C2), respectively; a first and a second voltage detection unit (612, 622) configured to detect a first and a second motor drive voltage applied to the first and the second motor; a first and a second stroke calculation unit (613, 623) configured to calculate a first and second stroke of the first compressor and the second compressor, respectively; and a control unit configured to generate the first and the second control signal based on a firing angle varying according to a load of the first and the second compressor (C1, C2) and to output them to the first and the second alternating current switch (21, 22), thereby an operation rate of the first or the second compressor (C1, C2) is controlled, wherein the compressor control apparatus is configured to operate the first and the second compressor (C1, C2) in a simultaneous manner or the first compressor or the second compressor in a separate manner, and wherein the load of the first and second compressors is detected using a phase difference between the detected motor drive current and an estimated stroke value, and a phase difference between the detected motor drive voltage and the estimated stroke value. a first and a second alternating current switch (21, 22) configured to switch AC power applied to a first and a second compressor (C1, C2) based on a first and a second control signal; a first and a second current detection unit (611, 621) configured to detect a first and a second motor drive current applied to a first and a second motor provided in the first compressor and the second compressor (C1, C2), respectively; a first and a second voltage detection unit (612, 622) configured to detect a first and a second motor drive voltage applied to the first and the second motor; a first and a second stroke calculation unit (613, 623) configured to calculate a first and second stroke of the first compressor and the second compressor, respectively; and a control unit configured to generate the first and the second control signal based on a firing angle varying according to a load of the first and the second compressor (C1, C2) and to output them to the first and the second alternating current switch (21, 22), thereby an operation rate of the first or the second compressor (C1, C2) is controlled, wherein the compressor control apparatus is configured to operate the first and the second compressor (C1, C2) in a simultaneous manner or the first compressor or the second compressor in a separate manner, and wherein the load of the first and second compressors is detected using a phase difference between the detected motor drive current and an estimated stroke value, and a phase difference between the detected motor drive voltage and the estimated stroke value.