Ernst Lübbert was the first child of the administrative officer Johann (Leonhard Christoph) Lübbert and his wife Fransika (Charlotte Marianne), née. Schäfer, born in the small Mecklenburg town of Warin. As the eldest of three sons, he grew up in Stavenhagen since 1886, where his father had found a job as an official record clerk. Lübbert first attended the Stavenhagener Bürgererschule, then a private boys' school there and finally briefly the grammar school in Neubrandenburg, which he left in 1896 without a high school diploma.
Lübbert embarked on a career in drawing early on. After brief private drawing and painting lessons, he studied from 1896 at the “Royal Academic University for the Fine Arts” in Berlin, with Adolf Schlabitz , Joseph Scheurenberg , Max Koner and Friedrich Kallmorgen , among others . His great talent quickly emerged. Since 1904 worked as a freelance artist. Extensive study trips took him to Dalmatia, Montenegro, Italy, Tyrol, Scotland and Paris.
Lübbert's main works are various oil paintings that have been shown at art exhibitions in Hamburg and Berlin. For the sake of earning a living, however, he mainly worked as a cartoonist and illustrator. Numerous drawings for advertisements appeared in the daily press. Lübbert is best known today for his participation in the work "The World in a Hundred Years" (Berlin 1910), to which u. a. Bertha von Suttner , Ellen Key , Bjørnstjerne Bjørnson , Eduard Bernstein and Hermann Bahr contributed.
On August 2, 1914, Lübbert was called up for military service. On the same day he married his long-time girlfriend Hedwig Techel. Filled with patriotic feelings, he took up the job. At dawn on August 29, 1915, as a lieutenant and company commander, he was shot in the stomach during an assault on Lipsk near Grodno on the Nyemen (today: Hrodna , Belarus ). His body was transferred to Schwerin and buried in the old cemetery there. The grave is adorned with an extraordinary tomb designed by Wilhelm Wandschneider .