Turkey's President Recep Tayyip Erdogan has promised to turn the new executive system in the country into a more efficient government compared to the old system.
At first, Erdogan will be sworn-in at the parliament on Monday at 4.30 p.m. local time (GMT1330).
The new cabinet, due to be announced at 1800 GMT, is expected to have a different look, especially after Erdogan said the government would include non-AKP figures.
The introduction of the new presidential system marks the biggest overhaul of governance since the Turkish republic was established on the ruins of the Ottoman Empire almost a century ago.
Also, a total of 28 foreign dignitaries - including prime ministers, vice presidents, parliament speakers and ministers - will also attend the ceremony. The opposition described Monday as the day when a partisan one-man regime officially starts ruling Turkey.
More than 150,000 state employees have lost their jobs in the crackdown following the coup attempt, and Turkey's interior minister said in April that 77,000 have been formally charged and kept in jail during their trials.
A decree published this week has already made changes to laws dating from 1924, just after the founding of the Turkish Republic by Mustafa Kemal Ataturk, to 2017, removing references to the prime minister.
He has also pledged to end the state of emergency that has been in place since the failed July 2016 coup and has seen the biggest purge in the history of modern Turkey.
Among them were Russian Prime Minister Dmitry Medvedev, Venezuelan President Nicolas Maduro and Qatari Emir Sheikh Tamim bin Hamad Al Thani. Erdoĝan has repeatedly clashed with strategic allies such as the USA and the European Union in recent years over the war in Syria, Turkey's accession to the EU, human rights abuses by Ankara, Europe's failure to support Turkey during the coup attempt, and rising Islamophobia in Europe.
On Saturday, Erdogan said he would tackle high interest rates, inflation and a wide current account deficit. The lira has also fallen by a fifth in value against the dollar this year.
The new executive presidency is to be inaugurated on Monday, when Erdogan takes his oath for a five-year term after victory in the elections of June 24.