The present invention discloses a laser power control system and the correlation method thereof, the system comprises a state determining circuit which is used for generating a state controlling signal according to a selected operating state of the target circuit; plural buffers which is used for storing plural control data which are respectively corresponding with the plural operating states forselecting on the target circuit; and a multiplex which is coupled between the state determining circuit and plural buffers and is used for coupling one selected buffer in the plural buffers with the target circuit according to the state determining signal in order to output one control data stored in the selected buffers to the target circuit. The invention can reduce the stabilization time in the target laser power converting procedure.