A adjustment method for adjusting a supply voltage of target load disposed on a chip, wherein a controller, a first sensor, a power gating array, reference load and a second sensor are further disposed on the chip, the power gating array and the first sensor are separately coupled to the controller, wherein a supply voltage of the reference load is a constant voltage, and the power gating array is configured to power the target load; and the method comprises: receiving, by the controller, a first status representation value from the first sensor and a third status representation value from the second sensor, wherein the first status representation value represents a node voltage of a first detection point inside the target load detected by the first sensor at a current moment when the power gating array supplies a first supply voltage to the target load, and the third status representation value represents a node voltage of a second detection point inside the reference load detected by the second sensor at a current moment; adjusting, by the controller, a second expected value according to a variation of the third status representation value relative to a fourth status representation value, to obtain the first expected value, wherein the second expected value represents an initial expected value of the node voltage of the first detection point when the fourth status representation value represents an initial node voltage of the second detection point, or the second expected value represents an expected value that is at a previous moment and that is of the node voltage of the first detection point when the fourth status representation value represents a node voltage of the second detection point at a previous moment, and the first expected value represents an expected value of a node voltage of the first detection point; determining, by the controller according to the first status representation value and the first expected value, whether to adjust the first supply voltage of the target load; and when determining to adjust the first supply voltage of the target load, sending, by the controller, a digital control signal to the power gating array, to control the power gating array to adjust the first supply voltage to supply second supply voltage to the target load. receiving, by the controller, a first status representation value from the first sensor and a third status representation value from the second sensor, wherein the first status representation value represents a node voltage of a first detection point inside the target load detected by the first sensor at a current moment when the power gating array supplies a first supply voltage to the target load, and the third status representation value represents a node voltage of a second detection point inside the reference load detected by the second sensor at a current moment; adjusting, by the controller, a second expected value according to a variation of the third status representation value relative to a fourth status representation value, to obtain the first expected value, wherein the second expected value represents an initial expected value of the node voltage of the first detection point when the fourth status representation value represents an initial node voltage of the second detection point, or the second expected value represents an expected value that is at a previous moment and that is of the node voltage of the first detection point when the fourth status representation value represents a node voltage of the second detection point at a previous moment, and the first expected value represents an expected value of a node voltage of the first detection point; determining, by the controller according to the first status representation value and the first expected value, whether to adjust the first supply voltage of the target load; and when determining to adjust the first supply voltage of the target load, sending, by the controller, a digital control signal to the power gating array, to control the power gating array to adjust the first supply voltage to supply second supply voltage to the target load.