The object of the invention is a method of control of an ammunition or submunition, and in particular of the control of initiation of fire and/or of control of a trajectory correction and/or of a direction of fire, from a target detection. The method consists of the following steps: (1) a field zone (2) is sweeped from the ammunition (6) or submunition using a laser beam (10), (2) a potential target (1) located on the field is spotted using a passive surveillance means (4), and (3) when the means of passive surveillance (4) detects the laser beam (10) transmitted by the ammunition or submunition, the transmission of an order of confirmation is controlled and/or of at least one off-target data via the means of surveillance (4) and towards the ammunition or submunition.