A biological intelligent electric oven comprises a barbecue device, a feeding device, a combusting device, a controller and a support. Automatic feeding can be achieved, the labor cost is lowered, it is unnecessary to guard by specially assigning person, foods are turned, air inside the barbecue device flows in a back flushing mode, heating is even, and the foods will not be contaminated and facilitate health of human bodies. Moreover, bio-fuel is adopted, in this way, the barbecued foods have the flavor of natural timber, the fuel is combusted sufficiently, no residual waste is generated, coal resources are saved, and the biological intelligent electric oven is more scientific and environmentally friendly and has high economical value.