The former Bordeaux boss penned a two-year deal to oversee Les Bleus' qualifying campaign for the tournament in Poland and Ukraine.
He succeeds Raymond Domenech in the hot seat and has plenty of work to do following a disastrous World Cup this summer which saw the side crash out of the tournament at the group stage amid major ructions between players and staff.
"It's Euro 2012 or I'm going," Blanc said. "I signed for two years. Then if we qualify and if we have a good Euro, we can possibly discuss an extension for two more years.
"I'll be judged on results. It's not my style to carry on if it's not working."
Asked whether he would seek to change the backbone of the team, Blanc said: "You cannot change the core of the team overnight."
He said: "No. If you can name me one (player who is guaranteed to keep his place), well done, because I do not see any, except the keeper."
France have been drawn in qualifying Group D with Romania, Bosnia and Herzegovina, Belarus, Albania and Luxembourg.