A photographing method of a dual-lens device, wherein the dual-lens device comprises a first lens and a second lens that are arranged on a same plane on a rear surface or a front surface of the dual-lens device, and the photographing method comprises: acquiring a first image collected by a first image sensor corresponding to the first lens; identifying a scenario of the first image to determine a photographing environment; determining, according to the photographing environment, a second image signal processor, ISP, parameter corresponding to the second lens, the ISP parameter includes an exposure time; acquiring a second image that is collected, by using the second ISP parameter, by a second image sensor corresponding to the second lens; and generating a preview image according to the second image; wherein the determining, according to the photographing environment, a second image signal processor, ISP, parameter corresponding to the second lens comprises: prolonging the exposure time of the second lens when the photographing environment is a backlit scene; wherein the identifying a scenario of the first image to determine a photographing environment comprises: when a difference between an average value of brightness of a center on the first image and an average value of brightness of surrounding of the first image is greater than a first threshold, adjusting a first ISP parameter corresponding to the first lens, wherein the adjusting a first ISP parameter corresponding to the first lens comprises prolonging an exposure time of the first lens; acquiring a third image that is collected, by using the first ISP parameter, by the first image sensor, wherein the third image is a next-frame image, after the first ISP parameter is adjusted, of the first image; and determining, according to the first image and the third image, whether the photographing environment is a backlit scene. acquiring a first image collected by a first image sensor corresponding to the first lens; identifying a scenario of the first image to determine a photographing environment; determining, according to the photographing environment, a second image signal processor, ISP, parameter corresponding to the second lens, the ISP parameter includes an exposure time; acquiring a second image that is collected, by using the second ISP parameter, by a second image sensor corresponding to the second lens; and generating a preview image according to the second image; wherein the determining, according to the photographing environment, a second image signal processor, ISP, parameter corresponding to the second lens comprises: prolonging the exposure time of the second lens when the photographing environment is a backlit scene; wherein the identifying a scenario of the first image to determine a photographing environment comprises: when a difference between an average value of brightness of a center on the first image and an average value of brightness of surrounding of the first image is greater than a first threshold, adjusting a first ISP parameter corresponding to the first lens, wherein the adjusting a first ISP parameter corresponding to the first lens comprises prolonging an exposure time of the first lens; acquiring a third image that is collected, by using the first ISP parameter, by the first image sensor, wherein the third image is a next-frame image, after the first ISP parameter is adjusted, of the first image; and determining, according to the first image and the third image, whether the photographing environment is a backlit scene. prolonging the exposure time of the second lens when the photographing environment is a backlit scene; wherein the identifying a scenario of the first image to determine a photographing environment comprises: when a difference between an average value of brightness of a center on the first image and an average value of brightness of surrounding of the first image is greater than a first threshold, adjusting a first ISP parameter corresponding to the first lens, wherein the adjusting a first ISP parameter corresponding to the first lens comprises prolonging an exposure time of the first lens; acquiring a third image that is collected, by using the first ISP parameter, by the first image sensor, wherein the third image is a next-frame image, after the first ISP parameter is adjusted, of the first image; and determining, according to the first image and the third image, whether the photographing environment is a backlit scene. when a difference between an average value of brightness of a center on the first image and an average value of brightness of surrounding of the first image is greater than a first threshold, adjusting a first ISP parameter corresponding to the first lens, wherein the adjusting a first ISP parameter corresponding to the first lens comprises prolonging an exposure time of the first lens; acquiring a third image that is collected, by using the first ISP parameter, by the first image sensor, wherein the third image is a next-frame image, after the first ISP parameter is adjusted, of the first image; and determining, according to the first image and the third image, whether the photographing environment is a backlit scene.