About display the image and description of user profile

Okay. I assume your custom template is based on the Plain template.

Try inserting this line in the loop in the template.

<?php var_dump( $aTweet['user'] ); ?>

It will list the user’s information in an array and find the correct index key for the item you want. In your case, followr’s count, the key may be something like followers_count. Then echo it like this.

<?php echo $aTweet['user']['followers_count']; ?>

Thanks so much, it works!
And can I get the follow button by the same way?

The follow button can be inserted with JavaScript.

Find the div tag block with the fetch-tweets-follow-button class selector in the Plain template. Put the modified version of it in your template. Just don’t forget to define the variables used in the code.

Well, Almost done now! Thank you so much!

Glad to hear it and thanks for the review!