A magnetic sound box device comprising a sound box and an antimagnetic plate is disclosed, wherein the sound box has at least one speaker and the sound box is for receiving sound source signals from an electronic device and transmitting the sound source signals to the speaker to play the sound source signals, and the lateral side of the sound box is disposed with a coupling portion; a plurality of magnets is disposed on the coupling portion so that the sound box can be magnetically attracted to any objects capable of being attracted by the magnets; the antimagnetic plate is disposed on the sound box for covering the coupling portion for blocking the magnetism of the magnets on the coupling portion, thereby preventing other storage devices with magnetic materials from being affected and damaged by the magnetism of the magnets when the magnetic sound box device is carried.