通过嵌入JS文件，我们可以这样做：

<img src="#" id="img-src">
<a href="#" id="img-upload">Add Image</a>

Content of JS file

jQuery(document).ready(function(e){
    e.preventDefault();
    jQeury(\'#img-upload\').click(function(){
        var upload = wp.media({
        title:\'Choose Image\', //Title for Media Box
        multiple:false //For limiting multiple image
        })
        .on(\'select\', function(){
            var select = upload.state().get(\'selection\');
            var attach = select.first().toJSON();
            console.log(attach.id); //the attachment id of image
            console.log(attach.url); //url of image
            jQuery(\'img#img-upload\').attr(\'src\',attach.url);
        })
        .open();
   });

});