A variable magnification method, apparatus and a computer-readable storage medium is disclosed. The method comprises: acquiring angle parameters for the current position of a camera after receiving a variable magnification instruction; wherein, the variable magnification instruction is configured for instructing the camera to perform the variable magnification based on a target magnification ratio parameter; querying target historical focusing information based on the angle parameters for the current position, wherein, the target historical focusing information comprises a historical magnification ratio parameter and a historical in-focus parameter of the camera; querying a target variable magnification curve based on the historical magnification ratio parameter and the historical in-focus parameter; and controlling the camera to perform the variable magnification based on the target variable magnification curve.