A network AV receiver device for reproducing music recorded in media servers (10, 20, 30) via a network, the network AV receiver device comprising: a music information storage unit configured to store music information of the music recorded in each media server (10, 20, 30) connected to the network; an input state detection unit configured to detect an input state of the media server that inputs the music now being reproduced; and a control unit configured to control an input instruction of the music from the media server, wherein, when the input state detection unit detects that an input state of music data now being reproduced is not normal, the control unit switches from music data recorded in the media server of the music data now being reproduced to music data recorded in another media server (20, 30) of the media servers based on the music information of the music recorded in each media server stored in the music information storage unit, wherein when the music information indicates that music data having the same music name as that of the music data now being reproduced is available in another media server (20, 30), the control unit switches the music data to music data having the same music name as a music name of the music data now being reproduced; and characterised in that when the music information indicates that music data having the same music name as that of the music data now being reproduced is not available in another media server (20, 30), and music data having the same tempo as that of the music data now being reproduced is available in another server (20, 30), the control unit switches the music data to music data having the same tempo as a tempo of the music data now being reproduced. a music information storage unit configured to store music information of the music recorded in each media server (10, 20, 30) connected to the network; an input state detection unit configured to detect an input state of the media server that inputs the music now being reproduced; and a control unit configured to control an input instruction of the music from the media server, wherein, when the input state detection unit detects that an input state of music data now being reproduced is not normal, the control unit switches from music data recorded in the media server of the music data now being reproduced to music data recorded in another media server (20, 30) of the media servers based on the music information of the music recorded in each media server stored in the music information storage unit, wherein when the music information indicates that music data having the same music name as that of the music data now being reproduced is available in another media server (20, 30), the control unit switches the music data to music data having the same music name as a music name of the music data now being reproduced; and characterised in that when the music information indicates that music data having the same music name as that of the music data now being reproduced is not available in another media server (20, 30), and music data having the same tempo as that of the music data now being reproduced is available in another server (20, 30), the control unit switches the music data to music data having the same tempo as a tempo of the music data now being reproduced.