In this paper, we perform a detail analysis on the phenomenology of Z' portal scalar and Dirac fermion dark matter in B-L scotogenic Dirac model. Unconventional B-L charge Q is assigned to the right-handed neutrino nu _R in order to realise scotogenic Dirac neutrino mass at one-loop level, where three typical value Q=-,frac{1}{4},-,4,frac{3}{2} are chosen to illustrate. Observational properties involving dilepton signature at LHC, relativistic degrees of freedom N_text {eff}, dark matter relic density, direct and indirect detections are comprehensively studied. Combined results of these observables for the benchmark scenarios imply that the resonance region M_text {DM}sim M_{Z'}/2 is the viable parameter space. Focusing on the resonance region, a scanning for TeV-scale dark matter is also performed to obtain current allowed and future prospective parameter space.