.full-screen {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.item>a{
    display: block;
    height: 100%;
}

<div id="mycarousel" class="carousel slide" data-ride="carousel">
	<ol class="carousel-indicators"></ol>
	<!-- 廣告輪播列表 -->
      <div class="carousel-inner" role="listbox">
        <div class="item">
            <a href="http://www.minwt.com">
                <img src="https://unsplash.it/2000/1250?image=001" data-color="#eee">
                <div class="carousel-caption">
                    <h3>廣告輪播1</h3>
                </div>
            </a>
        </div>
        <div class="item">
            <img src="https://unsplash.it/2000/1250?image=002" data-color="#eee">
            <div class="carousel-caption">
                <h3>廣告輪播2</h3>
            </div>
        </div>
        <div class="item active">
            <img src="https://unsplash.it/2000/1250?image=003" data-color="#eee">
            <div class="carousel-caption">
                <h3>廣告輪播3</h3>
            </div>
        </div>
        <div class="item">
            <img src="https://unsplash.it/2000/1250?image=004" data-color="#eee">
            <div class="carousel-caption">
                <h3>廣告輪播4</h3>
            </div>
        </div>
      </div>
      <!-- Controls -->
      <a class="left carousel-control" href="#mycarousel" role="button" data-slide="prev">
        <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
        <span class="sr-only">上一則</span>
      </a>
      <a class="right carousel-control" href="#mycarousel" role="button" data-slide="next">
        <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
        <span class="sr-only">下一則</span>
      </a>
</div>

$(function(){
    var $item = $('.carousel .item');
    var $wHeight = $(window).height();
    $item.height($wHeight);
    $item.addClass('full-screen');
    $('.carousel img').each(function() {
      var $src = $(this).attr('src');
      var $color = $(this).attr('data-color');
      $(this).parent().css({
        'background-image' : 'url(' + $src + ')',
        'background-color' : $color
      });
      $(this).remove();
    });
    //下方自動加入控制圓鈕
    var total = $('.carousel .carousel-inner div.item').size();
    append_li();
    function append_li()
    {
        var li = "";
        var get_ac = $( ".carousel .active" );
        var ac =  $( ".carousel .carousel-inner div" ).index( get_ac );
        for (var i=0; i <= total-1; i++){
            if(i == (ac)/2){
                li += "<li data-target='#mycarousel' data-slide-to='"+i+"' class='active'></li>";
            }else{
                li += "<li data-target='#mycarousel' data-slide-to='"+i+"' class=''></li>";
                }
            }
            $(".carousel-indicators").append(li);
        }
    //單則隱藏控制鈕
    if ($('.carousel .carousel-inner div.item').length < 2 ) {
            $('.carousel-indicators, .carousel-control').hide();
    }
    //縮放視窗調整視窗高度
    $(window).on('resize', function (){
      $wHeight = $(window).height();
      $item.height($wHeight);
    });
    //輪播秒數與滑入停止
    $('.carousel').carousel({
      interval: 5000,
      pause: "hover"
    });
});