how to save multiple checkboxes value in wordpress

This is my code for checkboxes.

<p class="full_form"><label for="prop_category"><?php _e('We are into','wpestate');?></label>
        <input type="checkbox" id="architecture" size="80" name="service_name[]" value="architecture" >Architecture
        <input type="checkbox" id="builder_developer" size="80" name="service_name[]" value="builder_developer">Builders and Developeres
        <input type="checkbox" id="material_supplier" size="80" name="service_name[]" value="material_supplier">Material Supplier
        <input type="checkbox" id="contractor" size="80" name="service_name[]" value="contractor">Contractor
        <input type="checkbox" id="int_decorator" size="80" name="service_name[]" value="int_decorator">Interior Decorator
        <input type="checkbox" id="prop_finance" size="80" name="service_name[]" value="prop_finance">Property Finance
        <input type="checkbox" id="prop_legal_ad" size="80" name="service_name[]" value="prop_legal_ad">Property Legal Advisor
        <input type="checkbox" id="prop_valuer" size="80" name="service_name[]" value="prop_valuer">Property Valuer
        <input type="checkbox" id="vastu_consult" size="80" name="service_name[]" value="vastu_consult">Vaastu Consultant

How Do I save multiple checkboxes in wordpress postmeta table? Should I save them as array? How Do I access them after form submit? And how do I display selected checkbox value while editing??

try this way Html code

<p class="full_form"><label for="prop_category">We are into</label>
            <input type="checkbox" id="architecture" size="80" name="service_name[]"  value="Architecture" >Architecture
            <input type="checkbox" id="builder_developer" size="80" name="service_name[]"  value="Builders and Developeres">Builders and Developeres
            <input type="checkbox" id="material_supplier" size="80" name="service_name[]" value="Material Supplier">Material Supplier
            <input type="checkbox" id="contractor" size="80" name="service_name[]" value="Contractor">Contractor
            <input type="checkbox" id="int_decorator" size="80" name="service_name[]" value="Interior Decorator">Interior Decorator
            <input type="checkbox" id="prop_finance" size="80" name="service_name[]" value="Property Finance">Property Finance
            <input type="checkbox" id="prop_legal_ad" size="80" name="service_name[]"  value="Property Legal Advisor">Property Legal Advisor
            <input type="checkbox" id="prop_valuer" size="80" name="service_name[]"  value="Property Valuer">Property Valuer
            <input type="checkbox" id="vastu_consult" size="80" name="service_name[]" value="Vaastu Consultant">Vaastu Consultant

Submit code for save

<?php 
        //submit code 
          if(isset($_POST['service_name'])  ){
              $data=serialize($_POST['service_name']);

              update_post_meta($postid, 'service_name', $data);
          }
        ?>

Edit code

<?php 
        //edit code

            $data=get_post_meta($postid, 'service_name');
            //$data=unserialize($data[0]);
            $data=$data[0];
            print_r($data);

        ?> 

        <input type="checkbox" id="architecture" size="80" name="service_name[]"  value="Architecture" <?php if(in_array('Architecture',$data)  ){echo "checked";} ?> >Architecture



//other checkbox put as this

in_array check it