A distributing collaborative computer editing system is provided. The computer editing system includes a storage unit, a searching unit, a splitting unit, a distributing unit and an aggregating unit. The storage unit is used for storing a multimedia provided from a host. The searching unit is used for searching a plurality of collaborators via a social network service associated with the host. The splitting unit is used for splitting the multimedia into a plurality of parts. The distributing unit is used for distributing those parts to the collaborators, such that the collaborators can edit those parts respectively. The aggregating unit is used for aggregating the edited parts.