A system and method for mounting a modular switch cabinet equipment in a switch cabinet housing (6) includes a computer-aided assistance unit (1) for determining a production-efficient assembly step sequence. The system and method further include at least one display unit (11-11′) for image and/or text information, which is installed at the assembly site for at least one fitter (M) in order to visualize manual assembly steps (A; B; D) of the determined assembly step sequence. The system and method further includes at least one input unit (12-12′) for acknowledgement of the completed assembly step (A; B; D) by the fitter (M).