A method of performing a method transfer from a first liquid chromatograph to a second liquid chromatograph, comprising the following steps: inputting data of a first column in the first liquid chromatograph and data of a second column in the second liquid chromatograph; and transferring from a first measuring method using the first column to a second measuring method using the second column by utilizing the data of the first column and the data of the second column, characterized in that said data utilizing in the transferring step includes: calculating a pressure value of the second column based on the pressure value (P 0) of the first column, the inner diameters (D 0, D 1) of the first and second columns, the flow rates (F 0, F 1) of the first and second columns, the lengths (L 0, L 1) of the first and second columns, and the particle diameters (d 0, d 1) of the first and second columns, pulling up the flow rate (F 1) of the second column using, based on said pressure value calculation, a pressure limit value (P limit) of the second column as a target so as to reach a pulled-up linear velocity (f), and calculating a gradient time program based on the pulled-up linear velocity (f), the lengths (L 0, L 1) of the first and second columns, and the dwell volumes (T delay0, T delay1) inside the first and second columns. inputting data of a first column in the first liquid chromatograph and data of a second column in the second liquid chromatograph; and transferring from a first measuring method using the first column to a second measuring method using the second column by utilizing the data of the first column and the data of the second column, characterized in that said data utilizing in the transferring step includes: calculating a pressure value of the second column based on the pressure value (P 0) of the first column, the inner diameters (D 0, D 1) of the first and second columns, the flow rates (F 0, F 1) of the first and second columns, the lengths (L 0, L 1) of the first and second columns, and the particle diameters (d 0, d 1) of the first and second columns, pulling up the flow rate (F 1) of the second column using, based on said pressure value calculation, a pressure limit value (P limit) of the second column as a target so as to reach a pulled-up linear velocity (f), and calculating a gradient time program based on the pulled-up linear velocity (f), the lengths (L 0, L 1) of the first and second columns, and the dwell volumes (T delay0, T delay1) inside the first and second columns. calculating a pressure value of the second column based on the pressure value (P 0) of the first column, the inner diameters (D 0, D 1) of the first and second columns, the flow rates (F 0, F 1) of the first and second columns, the lengths (L 0, L 1) of the first and second columns, and the particle diameters (d 0, d 1) of the first and second columns, pulling up the flow rate (F 1) of the second column using, based on said pressure value calculation, a pressure limit value (P limit) of the second column as a target so as to reach a pulled-up linear velocity (f), and calculating a gradient time program based on the pulled-up linear velocity (f), the lengths (L 0, L 1) of the first and second columns, and the dwell volumes (T delay0, T delay1) inside the first and second columns.