<div class="background">
    <div class="logo">
    </div>
</div>

.logo {
   background-image: url(image/logo2.png);
   height:40px;
   width:400px;
   margin-left:100px;
   display:block;
   margin-top:20px;
}

.background {
   background-image: url(image/empback.png);
   width:100%;
   height:94px;
   min-width:1345px;
}

<div class="background">
    <div class="logo">
    </div>
</div>

.logo
{
    background-image: url(image/logo2.png);
    height:40px;
    width:400px;
    margin-left:100px;
    display:block;
    position:absolute;
    top:20px;
}

.background
{
    background-image: url(image/empback.png);
    width:100%;
    height:94px;
    min-width:1345px;
    position:relative;
}

.background{
    background: #f00;
    width:100%;
    height:94px;
    min-width:1345px;
    overflow: auto;
}

.logo{
    position: relative;
    top: 10px;
    background-color: black;
    height: 40px;
    width: 400px;
    margin-left: 100px;
    display: block;
    margin-top: 20px;
}

.background{
     position: absolute;
     background-color: green;
     width: 100%;
     top: 50px;
     height: 94px;
     min-width: 1345px;
}