An automatic analyzer, including: a single reaction disk for holding a reaction vessel and carrying the reaction vessel to a predetermined operation position, the operation position including a dispensing operation position and a detection operation position on the single reaction disk; a detection unit, for detecting an analyte in the reaction vessel in the single reaction disk at the detection operation position; a single B/F unit, for removing unbound components of reaction system; a dispensing unit (502, 504, 510), for dispensing a reagent and/or a sample to the reaction vessel; a reaction vessel supply unit, for holding reaction vessels; and a conveying unit (506,500,520), for conveying the reaction vessel between the single reaction disk, the single B/F unit and the reaction vessel supply unit, wherein the conveying unit includes a first convey unit and a second convey unit, the first conveying unit for conveying the reaction vessel between the single reaction disk and the single B/F unit, the second conveying unit for conveying the reaction vessel between the single reaction disk and the reaction vessel supply unit; wherein the single reaction disk and the single B/F unit are independent structures, and the single B/F unit is disposed outside and separated from the single reaction disk with sufficient spacing to avoid cross-influence between the single B/F unit and the single reaction disk, and the single reaction disk is provided with a first incubation position and a second incubation position which are distinct from each other, wherein the single reaction disk is configured to incubate a solution with a reagent and a sample in the reaction vessel at the first incubation position to form a reaction solution, the first conveying unit is configured to convey the reaction solution in the reaction vessel to the single B/F unit to form a cleaned reaction solution, and convey the cleaned reaction solution with a signal reagent in the reaction vessel to the single reaction disk, and the single reaction disk is further configured to incubate the cleaned reaction solution with the signal reagent in the reaction vessel at the second incubation position to form an analyte, and convey the analyte to the detection operation position on the single reaction disk for detection. a single reaction disk for holding a reaction vessel and carrying the reaction vessel to a predetermined operation position, the operation position including a dispensing operation position and a detection operation position on the single reaction disk; a detection unit, for detecting an analyte in the reaction vessel in the single reaction disk at the detection operation position; a single B/F unit, for removing unbound components of reaction system; a dispensing unit (502, 504, 510), for dispensing a reagent and/or a sample to the reaction vessel; a reaction vessel supply unit, for holding reaction vessels; and a conveying unit (506,500,520), for conveying the reaction vessel between the single reaction disk, the single B/F unit and the reaction vessel supply unit, wherein the conveying unit includes a first convey unit and a second convey unit, the first conveying unit for conveying the reaction vessel between the single reaction disk and the single B/F unit, the second conveying unit for conveying the reaction vessel between the single reaction disk and the reaction vessel supply unit; wherein the single reaction disk and the single B/F unit are independent structures, and the single B/F unit is disposed outside and separated from the single reaction disk with sufficient spacing to avoid cross-influence between the single B/F unit and the single reaction disk, and the single reaction disk is provided with a first incubation position and a second incubation position which are distinct from each other, wherein the single reaction disk is configured to incubate a solution with a reagent and a sample in the reaction vessel at the first incubation position to form a reaction solution, the first conveying unit is configured to convey the reaction solution in the reaction vessel to the single B/F unit to form a cleaned reaction solution, and convey the cleaned reaction solution with a signal reagent in the reaction vessel to the single reaction disk, and the single reaction disk is further configured to incubate the cleaned reaction solution with the signal reagent in the reaction vessel at the second incubation position to form an analyte, and convey the analyte to the detection operation position on the single reaction disk for detection.