Hello Bui Tuan.

Did you mean to move this section to the beginning of the blog post? http://screen.stackideas.com/2015-06-03_1621.png

If yes, you can cut this code in ...\components\com_easyblog\themes\default\blog.read.php at line 167 until line 170.

	<?php if( $system->config->get('main_showauthorinfo') ) { ?>

		<!-- Blog Author's section -->

		<?php echo $this->fetch( 'author.info.php', array( 'authorRecentPosts' => $authorRecentPosts) ); ?>

	<?php } ?>

Then paste it in the same file at line 95.

Hope this help