A cable television system 100 according to the present invention comprises: non-subscriber station devices 400 and 500 having accounting servers 450 and 550, respectively, for each acquiring a delivery historical file having a set of delivery historical information representative of a history of delivering contents from the other non-subscriber station device which has been just before connected to a CATV mobile terminal device 200, to store the acquired delivery historical file therein, and to record the delivery historical information on the stored delivery historical file; and an accounting device 300 having an accounting server 330 for performing an accounting process on the basis of the delivery historical information stored by the accounting servers 450 and 550 of the non-subscriber station devices 400 and 500.