How can we use form directly without using drupal form handler I want to post a html form into block as content and wanted to submit the form to a page.
where I will need to get the form values using $_POST and do some process on it.

How can i do that without using drupal_form(), drupal_form_submit() handlers.

Any way we can achieve it.

Thanks.
If your goal is to just get the HTML output of an existing drupal form then this will get you there:

$form = drupal_get_form('drupal_form_id');
$form['#action'] = url('mypath');
print render($form); 


Replace 'drupal_form_id' with whatever registered Drupal form you want and url('mypath') with whatever URL you want to post to.