Juppe, who was French prime minister in the mid-90s under the presidency of Jacques Chriac, pledged to reform France's labor laws, which he believes are stifling the economy.
"The French are being kept from working by excessive labor costs. I want to cut those costs," he said.
"We need a different mindset."
On top of rolling back the contentious issue of France's 35-hour working week, Juppe said he would also raise the retirement age from 62 to 65, if elected president in next year's elections.
Debate Over France's Working Week
Widespread debate has surrounded France's labor laws, and in particular, the country's 35-hour working week.
Reformists say changes are necessary to help the country break the country's economic stagnation, while others argue the planned reforms will merely wash away existing workers' right and place more power in the hands of employers and big business.
The issue of workers' rights is highly contentious, with the current center-left Socialist government facing huge public criticism for its efforts to try and reform France's labor laws.
Francois Hollande's government will face a no-confidence motion after exercising a rarely used article in the constitution to push through a hugely controversial labor bill without a parliamentary vote.
The government is hoping to loosen some of the regulations surrounding France's working restrictions, which critics argue will make it companies to hire and fire workers.
Although the Socialists' plan would technically maintain the 35-hour week, clauses in the proposed labor bill could see employees asked to work up to 60-hours a week during "exceptional circumstances."
Juppe, Sarkozy to Go Head to Head
For his part, Juppe has proposed extending the existing working week to 39 hours.
The 70-year-old, who is currently leading opinion polls ahead of next year's presidential election, is vying for the center-right Republican Party's presidential nomination.
He is coming up against former French President Nicolas Sarkozy, who has also said that he would scrap the 35-hour working week and existing wealth taxes.