Disclosed is a method and an apparatus for supporting smooth and seamless handover of a terminal receiving digital broadcasting in a digital broadcasting system. A handover method by a network node includes the steps of receiving a handover proposal message from a terminal, the handover proposal message containing a time for signal quality evaluation, a service ID, and a cell ID, the terminal receiving a broadcasting service from a serving cell; evaluating signal qualities of candidate cells providing a service corresponding to the service ID; calculating a handover candidate parameter based on a result of evaluation of the signal qualities of the candidate cells, the handover candidate parameter indicating time available for handover with regard to respective candidate cells; and transmitting the handover candidate parameter to the terminal.