Invited on radio station France Inter on Thursday morning, she said the current financial system is "doomed."
"In the 1970s we passed political control to the banks and to the markets," she said. "Today, we are bound hand and foot to the financial markets, which have become mad, mad with greed."
Le Pen once again demanded that France should leave the euro, saying it was important to anticipate its eventual collapse "to avoid having to suffer a terrifying economic crisis."
She was scathing about President Sarkozy's emergency meeting on Wednesday to discuss the country's financial situation.
"He doesn't do anything because he can't do anything," she said. "The main characteristic of the French government is its powerlessness."
Le Pen plans to hold a press conference on Thursday afternoon to comment further on the economic situation.