The NLD is widely expected to do well in the election, but Ms Suu Kyi is banned from taking the role of president by the constitution.
The BBC's Jonah Fisher in Yangon says her comment was her strongest assertion yet that she intends to govern anyway.
The elections will be Myanmar's first openly contested polls in 25 years.
More than 90 parties are standing in the first national elections since a nominally civilian government took power in 2011.