The 24-year-old has impressed in the Bundesliga this season, scoring four goals in 28 appearances for the struggling Esprit Arena outfit.
He said that he loves his current club but feels ready to take the next step in his career.
"It's true, [we have] agreed terms and it's all about the details now," Sky Sports News quotes the Australian as saying.
"I love the Dusseldorf club and the fans, but I want to develop myself as a player."
Kruse, whose fee is estimated at around €1.5m (£1.2m), joined Dusseldorf from Melbourne Victory two years ago.