The brother of Oleguer Junyent, he was very concerned about cultural matters and participated in several artistic fields.

He trained at La Llotja, the Barcelona School of Fine Arts, and went to Paris and Italy to broaden his knowledge. He started out making tapestries, but soon went over to genre painting (Clorosí [Chlorosis], 1899; MNAC collection) and sentimental, decadentist landscapes. In 1900 he went back to Paris with Picasso, with whom he had shared a workshop in Barcelona. This brought about a major change in his pictorial work, which from then on tended towards a more Symbolist style.

He was a prominent art critic, contributing to the magazines Joventut and La Renaixença.

During his career he worked as a poster designer, a book binder and, particularly, an interior decoration designer.