The invention provides a method and system for acquiring the focus curved surface of a camera core lens. The method comprises the following steps: dividing the object distance into N sections, and extracting M object distance values in each N section, wherein M and N are positive integers; sending an instruction to a core to measure a focus curve of M*N object distance values; and fitting the M*Nfocus curves to form the focus curved surface. Through adoption of the method and the system, the technical problem of complex workload due to manual or semi-automatic measurement of a large number offocus points is solved, and the accuracy and speed of the focus curve are taken into consideration.