A call rejecting system (100) includes a base station (10) and a mobile terminal (20). The base station includes a controlling module (11), a storage module (12) and a comparing module (13). The controlling module is electronically connected to the storage module and the comparing module. The mobile terminal sends prohibited phone numbers to the base station. The prohibited phone numbers is stored in the storage module. When the base station receives a call signal calling the mobile terminal, the comparing module compares the number of the call signal with the prohibited phone numbers sent by the mobile terminal. The controlling module rejects the call signal or transmits the call signal to the mobile terminal according to the result of comparison.