De Boer takes over from Koeman, who left to become the new Barcelona boss in August.
"I have many similarities with Ronald and I want to follow his path," De Boer admitted to the press.
"He's done very well in the last two years.
"I think we have a bright future ahead of us.
"Koeman and the [Dutch football] federation started [the job] two years ago.
"We have a good group and a good squad."