WordPress currently supports importing data in the form of posts (articles) and most of the details or features supported by the content publishing platform.

Most of the following Content Import scripts can be found under the “Import” tab of your WordPress administration interface.

If you run into specific problems, a search on the WordPress Support Forum will likely lead to a solution or try the Codex FAQ. Users of a blogging system not listed here who wish to switch to WordPress are invited to ask for help in the WordPress Support Forum as well.

To help you understand the differences between WordPress and other existing software, we recommend you review the WordPress Features and more on Working with WordPress.

Source:Wordpress.com