[Answered ]-Why I can't open any port when I deploy my django on my server, but my test program can run on my own machine

Two things.

Firstly, as the documentation explains, by default runserver only binds to the localhost interface, which means it is only available on a browser running on the same machine. To get it to be visible outside the local machine, you need to bind to an externally-visible address, or 0.0.0.0 for all addresses:

python manage.py runserver 0.0.0.0:8080

Secondly, as the documentation also explains, you should not be trying to use the development server in a production setting anyway. Use a proper webserver, eg Apache + mod_wsgi.