Between 1900 and 1902, he published with Martin Gerlach and Carl Otto Czeschka a three volume portfolio titled Die Quelle ("The Source") of elegant graphic designs for such things as tapestries, fabrics, and wallpaper.

[1] In 1903, Moser and his colleague Josef Hoffmann founded Wiener Werkstätte, whose studios and artisans produced a number of aesthetically and functionally designed household goods, including glassware, flatware, silverware, rugs[2][3] and textiles.

In 1904, he created the Apse mosaic and glass windows for the Kirche am Steinhof in Vienna, and designed the decoration of the Medallion House of the Linke Wienzeile Buildings for architect Otto Wagner.

[5] On 3 May 2010, Swann Galleries auctioned the third volume in Moser's three-volume series "Die Quelle," containing 30 sumptuous decorations for flat surfaces, such as tapestries, wallpaper and fabrics, in the original portfolio.

[6] To commemorate the centennial of his death, the Museum of Applied Arts Vienna (MAK) honored Moser with one of the most comprehensive solo shows to date (19 December 2018-22 April 2019).