A method and a system for processing multicast services, binding each user to a default profile for separately configuring the authority over programs for the user and a right suite profile which prefabricates combination of programs and authority, directly forwarding a program to the superuser; for a non-superuser, acquiring authority over the program by traversing all profiles to which the user is bound, not forwarding the program if the user does not have the authority over the program; if the user has the authority over the program, forwarding a program stream to the user in the case that the program stream has been forwarded to the multicast service processing system. By the invention, the flexibility of multicast service processing is improved, individualized services of a user are implemented. The invention also provides a mode for processing a superuser, which provides real highly efficient and convenient privilege processing to the superuser.