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// Get The Page ID You Need
get_option( 'woocommerce_shop_page_id' ); 
get_option( 'woocommerce_cart_page_id' ); 
get_option( 'woocommerce_checkout_page_id' );
get_option( 'woocommerce_pay_page_id' ); 
get_option( 'woocommerce_thanks_page_id' ); 
get_option( 'woocommerce_myaccount_page_id' ); 
get_option( 'woocommerce_edit_address_page_id' ); 
get_option( 'woocommerce_view_order_page_id' ); 
get_option( 'woocommerce_terms_page_id' ); 

// An Example
function get_shop_featured_image() {
  if( is_shop() ) {
    $shop = get_option( 'woocommerce_shop_page_id' );
    if( has_post_thumbnail( $shop ) ) {
      echo get_the_post_thumbnail( $shop );
    }
  }
}

// In You Templage File Place The Following
// Line To Call The WooCommerce Shop Featured Image
// Now You're Cooking With Gas - BOOM!!

<?php get_shop_featured_image(); ?>