A systematic review is considerably more in-depth than a literature review. Systematic reviews aim to find and evaluate every source of evidence relevant to your research question. Systematic reviews should follow a clear and specific methodology so that they can be easily verified and replicated. In summary you will need to:
The Centre for Reviews and Dissemination at the University of York has a useful guide to undertaking systematic reviews. You can browse examples of existing systematic reviews in the Cochrane Database of Systematic Reviews.