An image photographing method, comprising: obtaining, by a terminal device, an image comprising a to-be-photographed target object, and extracting feature information of the to-be-photographed target object from the image comprising the to-be-photographed target object; determining, by the terminal device, a target region on a preview screen presented in a display interface of the terminal device; and triggering, by the terminal device, photographing when determining that feature information of an image in the target region comprises the feature information of the to-be-photographed target object, characterized in that the determining, by the terminal device, that feature information of an image in the target region comprises the feature information of the to-be-photographed target object comprises: obtaining, by the terminal device, the feature information of the image in the target region on the preview screen, and matching the feature information of the image in the target region with the feature information of the to-be-photographed target object; and if a value of a similarity between the feature information of the image in the target region and the feature information of the to-be-photographed target object is greater than a preset threshold, determining, by the terminal device, that the feature information of the image in the target region comprises the feature information of the to-be-photographed target object. obtaining, by a terminal device, an image comprising a to-be-photographed target object, and extracting feature information of the to-be-photographed target object from the image comprising the to-be-photographed target object; determining, by the terminal device, a target region on a preview screen presented in a display interface of the terminal device; and triggering, by the terminal device, photographing when determining that feature information of an image in the target region comprises the feature information of the to-be-photographed target object, characterized in that the determining, by the terminal device, that feature information of an image in the target region comprises the feature information of the to-be-photographed target object comprises: obtaining, by the terminal device, the feature information of the image in the target region on the preview screen, and matching the feature information of the image in the target region with the feature information of the to-be-photographed target object; and if a value of a similarity between the feature information of the image in the target region and the feature information of the to-be-photographed target object is greater than a preset threshold, determining, by the terminal device, that the feature information of the image in the target region comprises the feature information of the to-be-photographed target object. obtaining, by the terminal device, the feature information of the image in the target region on the preview screen, and matching the feature information of the image in the target region with the feature information of the to-be-photographed target object; and if a value of a similarity between the feature information of the image in the target region and the feature information of the to-be-photographed target object is greater than a preset threshold, determining, by the terminal device, that the feature information of the image in the target region comprises the feature information of the to-be-photographed target object.