Born in Paris, Janet was admitted in 1833 at the École des beaux-arts de Paris in the workshops of Ingres, Horace Vernet and Alexandre-Marie Colin.
He made his debut at the Salon of 1836 and continued to participate until 1870.
He painted hunting scenes, military costumes and portraits[1] and composed paintings retracing episodes of French history, such as the Crimean War from 1853 to 1856,[2] the Second Italian War of Independence (1859) and the Second French intervention in Mexico from 1861 to 1867.
He provided illustrations for newspapers such as L'Illustration, Le Tour du monde [fr], the Journal amusant and the Le Journal pour rire [fr].
He also did some book illustration, including for the French edition of G. A. Henty's The Young Franc-Tireurs (1873), Librairie Hachette, Paris.