He also said he would deliver power back to the people and focus on an 'America first' policy.
He said: "Now is the dawn of a new era of American independence. A rededication of the idea that the people are in charge of their destiny.
"This is a chance to deliver lasting change for our great nation – to deliver power to Americans."
Donald Trump has promised to put America first again
He also said he would crack down on "sanctuary cities", where migrants are protected from deportation – including Philidelphia, where the 45th president of America is currently speaking.
Donald Trump also said he wished his team would be approved quicker due to Prime Minister Theresa May's visit tomorrow.
Donald Trump has promised to put America first
He said: "I'm meeting with the Prime Minister tomorrow, Great Britain, you know.
"I don’t have my commerce seceretary! So I’ll have to handle it myself. It’s okay."
Donald Trump's Action Plan
Thu, January 19, 2017
What follows is Donald Trump's action plan to 'Make America Great Again' within the first 100 days of Presidency.
1 of 10
FIRST: Propose a Constitutional Amendment to impose term limits on all members of Congress.
He continued: "It’s going to be America first again. We’ll create millions of well-paying jobs. We’ll massively lower taxes for our middle class and all American businesses.
"We have to fix what we have. It's a mess."
The Air Force One is the official plane for US presidents
He arrived at the speech after travelling on Air Force One for the first time.
The aircraft is a symbol of the American presidency and power.
During his campaign trail Mr Trump used ‘Trump Force One’, his personal jet.
Trump used his own plane during the campaign trail
Theresa May is on her way to Philadelphia to meet Donald Trump.
Mr Trump is due to speak to a group of lawmakers.
Air Force One won't be Trump's first personal plane
Before leaving office, President Obama said earlier this month that the one thing he will miss most is the use of Air Force One.
Theresa May is set to meet Donald Trump for the first time in a bid to ensure the paid have a good relationship going forward.