Along with hundreds of shops, the mall houses two food courts, Megabox (movie theatres), COEX Aquarium and a large bookstore, but the Kimchi Fields Museum has moved to Insadong. It features a game area that is used to film computer game tournaments, which are broadcast on local television. There are stages inside and outside the mall for seasonal events and public appearances by celebrities. Millennium Square is the main exit of COEX Mall connecting with Line 2's Samseong Station.
In May 2012, KITA (Korea International Trade Association) announced major renovation plans for the mall. It will spend ₩180 billion to the upgrade project. The renovation is needed to create passenger walkways between the new Bongeunsa Station on Seoul Subway Line 9, due for completion in 2014, with Samseong Station on Line 2. It was scheduled to start at the end of 2012 and complete by November 2014. The floor space is expected to increased to 173,025 square metres (206,936 square yards) from its current 152,116 square metres (181,929 square yards).
COEX complex full renovation was completed on 27 November 2014.