Sirisena made the revelation in an interview with the BBC's Sinhala service Sandeshaya journalist Saroj Pathirana from his official residence in Colombo.
He however said that the title of Commander-in-Chief heading the armed forces will continue under the Presidency as it is but within a framework where executive powers will not have a say.
Sirisena also reiterated in the interview with the BBC's Sandeshaya service that relief for the people from the high cost-of-living will also be drastically addressed under the 100-day campaign to rid the Presidency of executive powers.
He also said that problems facing minority communities will be addressed under an all party government.