How do I install Drush 9 on Windows 7 with Composer?
The Drush 9 documentation is pretty clear: Install Drush locally, in your Drupal site, using composer. You can install Drush Launcher in addition if you want it more convenient. 

Without Drush Launcher, you can use the site local Drush be running

vendor\bin\drush some-drush-option


from your Drupal site root. No need to modify any paths.

If you install the Drush launcher (and use Windows), create a suitable bat file.

NB! Adding C:\Users\Md. Shafiq Hossain\AppData\Roaming\Composer\vendor\drush\drush to the path is plain wrong. If you really want to modify the path (to get the convenience of using just drush without installing Drush Launcher), the correct path is [...]\vendor\bin.