A total of 600 male broiler chickens were randomly allocated to 1 of the following 3 rearing systems, multilayer cage rearing system (CRS), litter rearing system (LRS), and plastic flat net rearing system (NRS), to investigate the effects of different rearing systems on growth performance, nutrients digestibility, digestive organ weight, carcass traits, and energy utilization in male broiler chickens with 10 replicate cages or pens and 20 chickens per cage or pen.