He was born François-Xavier Méthotte in Pointe-aux-Trembles, Lower Canada in 1796 and settled in the Lower Town of Quebec City, entering the wholesale and retail hardware business.
He also set up factories to manufacture putty, cut nails and millstones.
Méthot was named a justice of the peace, served on the city council and was a captain in the local militia.
Méthot was elected to the Legislative Assembly of the Province of Canada for Quebec City as a Reformer in an 1848 by-election.
His son François-Xavier was a member of the Quebec legislative assembly and the Canadian House of Commons.