The present disclosure relates to a novel class of anti-TNFa monoclonal antibodies or antigen binding fragments comprising a homogeneous population of anti-TNFa IgG molecules having the same N-glycan on each of Fc. The antibodies of the invention can be produced from anti-TNFa monoclonal antibodies by Fc glycoengineering. The glycoantibodies of the invention may have improved therapeutic values compared to the corresponding monoclonal antibodies that have not been glycoengineered.