Representatives of more than 100 countries gathered in the Emirati city for talks on the event, which Dubai won the right to host in 2013.
"For the first time in the history of World Expos, each country will have an individual pavilion, enhancing the ability of nations to showcase themselves," organisers said in a statement.
The Expo site will cover 438 hectares (1,080 acres) next to Dubai's smaller second airport, Al-Maktoum International, which opened in 2013.
The fair will take place from October 2020 to April 2021.
