A method and device for double-camera-based imaging are provided. The method includes the following actions. A first image is acquired by a main camera and a second image is acquired by an auxiliary camera. A main image resolution and an auxiliary image resolution are determined according to a determined shooting mode and resolutions of the main camera and the auxiliary camera respectively. The first image is converted into a main image with the main image resolution. The second image is converted into an auxiliary image with the auxiliary image resolution according to the second image. A required target image is obtained according to the main image and the auxiliary image.