A method for preparing slurry for a secondary battery, the method comprising: a powder injection step of injecting powder for preparing the slurry, which is used for manufacturing the secondary battery, into a mixer for preparing the slurry; a data collection step of measuring a torque value applied to the mixer after injecting a solvent into the mixer; a storage step of storing a maximum torque value of the plurality of torque values collected in the data collection step, a calculation step of calculating a kneading point that is a mixing ratio of the powder and the solvent, which are used for preparing the slurry, by using the maximum torque value stored in the storage step, a kneading point reaching step of additionally injecting the solvent into the mixer until the mixing ratio reaches the kneading point, wherein the data collection step comprises: a solvent injection step of injecting the solvent into the mixer; and a torque measuring step of measuring the torque value applied to the mixer, wherein the solvent injection step and the torque measuring step are alternately performed to measure a plurality of torque values applied to the mixer, wherein, in the calculation step, the kneading point is a mixing ratio of the powder and the solvent when the torque value applied to the mixer reaches a torque value corresponding to a predetermined ratio of the maximum torque value, wherein the predetermined ratio ranges from 30% to 50%, and wherein, after the mixing ratio reaches the kneading point, the powder which was injected in the powder injection step and the solvent which was injected in the solvent injection step and the kneading point reaching step are mixed at the kneading point to prepare the slurry. a powder injection step of injecting powder for preparing the slurry, which is used for manufacturing the secondary battery, into a mixer for preparing the slurry; a data collection step of measuring a torque value applied to the mixer after injecting a solvent into the mixer; a storage step of storing a maximum torque value of the plurality of torque values collected in the data collection step, a calculation step of calculating a kneading point that is a mixing ratio of the powder and the solvent, which are used for preparing the slurry, by using the maximum torque value stored in the storage step, a kneading point reaching step of additionally injecting the solvent into the mixer until the mixing ratio reaches the kneading point, wherein the data collection step comprises: a solvent injection step of injecting the solvent into the mixer; and a torque measuring step of measuring the torque value applied to the mixer, a solvent injection step of injecting the solvent into the mixer; and a torque measuring step of measuring the torque value applied to the mixer, wherein the solvent injection step and the torque measuring step are alternately performed to measure a plurality of torque values applied to the mixer, wherein, in the calculation step, the kneading point is a mixing ratio of the powder and the solvent when the torque value applied to the mixer reaches a torque value corresponding to a predetermined ratio of the maximum torque value, wherein the predetermined ratio ranges from 30% to 50%, and wherein, after the mixing ratio reaches the kneading point, the powder which was injected in the powder injection step and the solvent which was injected in the solvent injection step and the kneading point reaching step are mixed at the kneading point to prepare the slurry.