1. A method for acquiring an image, for use in an electronic apparatus including one image acquisition unit, wherein, the method comprises: determining at least a first focus and a second focus in an image acquisition area; acquiring first image information in the image acquisition area corresponding to the first focus; acquiring second image information in the image acquisition area corresponding to the second focus; processing the first image information and the second image information to obtain third image information, wherein the first image information and the second image information are acquired by the one image acquisition unit, and the determining at least a first focus and a second focus in an image acquisition area includes: providing a focus selection mode including a single-focus mode or a multi-focus mode; when the multi-focus mode is selected, determining and recording position of the first focus based on a first operation on a input device of the electronic apparatus; after determining and recording position of the first focus, determining and recording position of the second focus based on a second operation on the input device of the electronic apparatus, the first focus and the second focus being on different planes for image acquisition.