A method of identifying a charging device, wherein a marker is provided on the charging device, a reflectivity of the marker is greater than a first specified value, and the method is applied to a mobile robot, and comprises: capturing an infrared image and a depth image of a current field of view with a depth camera; determining, according to the infrared image, whether there are one or more suspected charging device areas that satisfy first specified conditions, wherein the first specified conditions indicate that a gray-scale value of each of pixels in an area is greater than a second specified value, and a number of the pixels in the area is greater than a third specified value; in response to determining there are the one or more suspected charging device areas, determining, according to the depth image, whether there is a target charging device area whose height relative to the depth camera falls within a specified range in the one or more suspected charging device areas; and in response to determining there is the target charging device area in the one or more suspected charging device areas, identifying the charging device according to the target charging device area, wherein the method further comprises: when capturing the infrared image and the depth image of the current field of view with the depth camera, or when it is determined that there is the target charging device area in the one or more suspected charging device areas, capturing a red, green and blue, RGB, image of the current field of view with a RGB camera; and wherein identifying the charging device according to the target charging device area comprises: extracting a target RGB image area corresponding to the target charging device area from the RGB image; determining whether the target RGB image area matches a pre-stored standard RGB image of the marker; and in response to determining the target RGB image area matches the pre-stored standard RGB image of the marker, determining that the target charging device area is an area where the charging device is located. capturing an infrared image and a depth image of a current field of view with a depth camera; determining, according to the infrared image, whether there are one or more suspected charging device areas that satisfy first specified conditions, wherein the first specified conditions indicate that a gray-scale value of each of pixels in an area is greater than a second specified value, and a number of the pixels in the area is greater than a third specified value; in response to determining there are the one or more suspected charging device areas, determining, according to the depth image, whether there is a target charging device area whose height relative to the depth camera falls within a specified range in the one or more suspected charging device areas; and in response to determining there is the target charging device area in the one or more suspected charging device areas, identifying the charging device according to the target charging device area, wherein the method further comprises: when capturing the infrared image and the depth image of the current field of view with the depth camera, or when it is determined that there is the target charging device area in the one or more suspected charging device areas, capturing a red, green and blue, RGB, image of the current field of view with a RGB camera; and wherein identifying the charging device according to the target charging device area comprises: extracting a target RGB image area corresponding to the target charging device area from the RGB image; determining whether the target RGB image area matches a pre-stored standard RGB image of the marker; and in response to determining the target RGB image area matches the pre-stored standard RGB image of the marker, determining that the target charging device area is an area where the charging device is located. when capturing the infrared image and the depth image of the current field of view with the depth camera, or when it is determined that there is the target charging device area in the one or more suspected charging device areas, capturing a red, green and blue, RGB, image of the current field of view with a RGB camera; and wherein identifying the charging device according to the target charging device area comprises: extracting a target RGB image area corresponding to the target charging device area from the RGB image; determining whether the target RGB image area matches a pre-stored standard RGB image of the marker; and in response to determining the target RGB image area matches the pre-stored standard RGB image of the marker, determining that the target charging device area is an area where the charging device is located. extracting a target RGB image area corresponding to the target charging device area from the RGB image; determining whether the target RGB image area matches a pre-stored standard RGB image of the marker; and in response to determining the target RGB image area matches the pre-stored standard RGB image of the marker, determining that the target charging device area is an area where the charging device is located.