Abstract: Disclosed is a multichannel signal receiver which comprises: a descrambler for descrambling scrambled digital satellite broadcasting signals; a signal receiver for receiving and outputting a broadcasting signal; a signal output unit for demultiplexing and demodulating the broadcasting signal, and outputting audio and video signals; a common interface controller for checking whether the broadcasting signal is a paid or a free signal, outputting the broadcasting signal to the signal output unit when the broadcasting signal is a free signal, and outputting the broadcasting signal to the descrambler and outputting the descrambled broadcasting signal to the signal output unit when the broadcasting signal is a paid signal; and a host CPU for controlling the signal receiver, the common interface controller and the signal output unit.