This construction machine control system is provided with a work machine having a boom, an arm, and a bucket, and is also provided with: an adjustment device that has a movable spool and that can move the spool to adjust the amount of hydraulic oil supplied to a hydraulic cylinder that drives the work machine; an operation command means that adjusts the spool; a storage unit that, depending on the type of bucket, stores a plurality of correlation data indicating the relationship between the cylinder speed of the hydraulic cylinder and the operation command value that operates the hydraulic cylinder; an acquisition unit that acquires type data indicating the type of bucket; and a control unit that, on the basis of the type data, selects one set of correlation data from the plurality of correlation data and controls the operation command value on the basis of the selected correlation data.