A compressor system includes a compressor and a supply control unit that controls a state of supply of water and a state of supply of oil. The supply control unit includes a rate-of-change acquisition unit that acquires a rate of change in efficiency of the compressor, a supply amount acquisition unit that acquires the amount of supply of the oil, an operating cost acquisition unit that acquires an operation cost from the rate of change, an oil cost acquisition unit that acquires an oil cost from the amount of supply of the oil, and a cost relationship acquisition unit that acquires a plurality of provisional relationship values that are the relationship between the operating cost and the oil cost under each of the plurality of provisional cleaning conditions.