A method, characterized by comprising: a, initializing operation parameters of a reader, wherein the step of initializing operation parameters comprises: the reader setting a current power level P as P=P min -0.5, wherein, a minimum power level P min and a maximum power level P max are decided by a power level range of the reader itself, further comprising initializing X i as 0 and initializing a Q value as 1, wherein X i is an iteration value and the Q value is a quality factor of an antenna of the reader, said quality factor influencing the transmission efficiency and throughput of reader energy; b, adjusting the operation parameters, wherein the step of adjusting the operation parameters comprises: adding an increment value to the current power level, and adding 1 to the Q value at the meantime; when the increment value is added to the current power level P, assuming that the increment value is 0.5, P=P+0.5, then comparing the current power level P and the maximum power level P max, if P is greater than P max, acquiring the current number of frame timeslots according to the current Q value and the formula N S =2 Q, and executing step d below, and if P is not greater than P max, executing step c below; c, updating a frame timeslot status, and judging whether the current power level is required to be increased according to the updated frame timeslot status, if yes, executing the step b, and if not, executing the step d; and d, estimating a number of labels according to the current number of frame timeslots by making the current number of frame timeslots equal to a total number of labels, and according to a mapping relationship table between the total number of labels and the optimum Q value, acquiring an optimum Q value corresponding to the total number of labels, and setting the current Q value as the optimum Q value. a, initializing operation parameters of a reader, wherein the step of initializing operation parameters comprises: the reader setting a current power level P as P=P min -0.5, wherein, a minimum power level P min and a maximum power level P max are decided by a power level range of the reader itself, further comprising initializing X i as 0 and initializing a Q value as 1, wherein X i is an iteration value and the Q value is a quality factor of an antenna of the reader, said quality factor influencing the transmission efficiency and throughput of reader energy; b, adjusting the operation parameters, wherein the step of adjusting the operation parameters comprises: adding an increment value to the current power level, and adding 1 to the Q value at the meantime; when the increment value is added to the current power level P, assuming that the increment value is 0.5, P=P+0.5, then comparing the current power level P and the maximum power level P max, if P is greater than P max, acquiring the current number of frame timeslots according to the current Q value and the formula N S =2 Q, and executing step d below, and if P is not greater than P max, executing step c below; c, updating a frame timeslot status, and judging whether the current power level is required to be increased according to the updated frame timeslot status, if yes, executing the step b, and if not, executing the step d; and d, estimating a number of labels according to the current number of frame timeslots by making the current number of frame timeslots equal to a total number of labels, and according to a mapping relationship table between the total number of labels and the optimum Q value, acquiring an optimum Q value corresponding to the total number of labels, and setting the current Q value as the optimum Q value.