Large communication area. Any two places within the coverage of radio transmission by satellite can communicate with each other.

Seldom effected by land disaster ( high reliability)

Circuit can be started upon establishing earth station (prompt circuit starting)

Can be received at many places simultaneously, and realize broadcast, multi-access communication economically( feature of multi-access)

Very flexible circuit installment , can disperse over-centralized traffic at any time.

One channel can be used in different directions or areas (multi-access connecting).