The invention discloses an image style conversion method, which comprises the following steps of: receiving an image style conversion request, and acquiring an initial image to be converted in the image style conversion request and a reference image serving as style reference; Inputting the initial image into a preset image classifier to obtain image content information corresponding to the initial image; Inputting the reference image into a preset processing model, and training the preset processing model to obtain an image processing model of a style corresponding to the reference image; Andinputting the image content information into the image processing model to obtain a target style image corresponding to the initial image. The invention further discloses an image style conversion device and equipment and a computer storage medium. The efficiency and accuracy of image style conversion are improved.