How to let the post show from lowest to highest?

If you want your posts show from lowest to highest, it is very simple, just add:
<!–p query_posts($query_string.’&order=ASC’);–>

for example, the following code will let all your post show from lowest to highest:

<!–p query_posts($query_string.’&order=ASC’);–>
<!–p if (have_posts()) : while (have_posts()) : the_post();–>