His style merges Lombard with Mannerist styles, however, unlike his siblings, he is known for a series of canvases, mostly painted after the 1570s, displaying genre scenes and local produce. Many set at a food store front of some sort. At the time, this type of painting was uncommon in Italy, and more common in the Netherlands, as exemplified by the canvases of Joachim Beuckelaer.
In Cremona, his extended family was the main artistic studio of his time. Giulio Campi and Antonio Campi were reportedly half-brothers, while Bernardino Campi was a distant relative. All were active and prominent local painters. In 1586-1589, he and his brother Antonio completed paintings for the church of San Paolo Converso in Milan.