In this article educational activity of the School of Agriculture and Botany of Barcelona during 1815 to 1821 is explained. This work focus on The teaching of the system of classification of plants created by Carl Linné and the role played by Joan Francesc Bahí, first teacher of the School, in the introduction and consolidation of this system in the botanical teaching at that time. In this sense, in this work we study and analyze the didactic tools that Bahí used to teach the linnean theories in Barcelona: his translation into Spanish of the handbook of botany written by Josef Jacob Plenk, a clear linnean work and used as textbook in the School; and the conception of the botanical garden of the School, prepared specifically for teaching the sexual system of plant
